Underpants is Ridiculously Idiotic

Reacting to the UNDERTALE meme Parody series UNDERPANTS by Sr Pelo! Because of the Friday Night Funkin' Indie Cross FNF mod and the bonus secret song with Sans Saness, I was told to react and watch the hilarious Underpants animation. We check out all the videos by Sr Pelo which are "Underpants - Normal Ending (SPOILERS)", "Underpants - True Ending (SPOILERS)", "Underpants - Genocide Ending (APRIL FOOLS)","Underpants - Genocide Ending (SPOILERS)", "UNDERPANTS - 17" and "Underpants -INTRO (HAPPY BDAY UNDERTALE). The series is ridiculously funny, and is just pure gold with it's memes even to this day, and even though it spoofs the series to a seriously stupid degree, it manages to keep the main beats of each Undertale ending and Undertale route.
(watch the original underpants animated episodes by Sr Pelo here)
UNDERPANTS - • Underpants - Normal En...
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#reaction #undertale #mairusu

[@sans871gd8]

It’s legitimately crazy how many people didn’t know what underpants was before Indie Cross.

[@rapeepat82]

I think like that too.

[@ifarded6449]

*My disappointment is un-measurable*

[@stilljustastupididiot]

you gotta be joking, right?

[@just_sonic]

this makes me sad but eh i dont care really

[@SFTellez]

I did, I loved seeing him in indie cross

[@nezuko4014]

Ah yes, underpants the series that made sr pelo become the meme material

[@Mairusu]

Hahah

[@inaudivle]

Don't forget mokey's show

[@budgieibe2531]

@@inaudivle *Spooky month!!!*

[@canorth1057]

i only know realise that inside sans when he gets electrocuted is ness XD

[@Flufster1]

@@Mairusuyou should also check out the disbelief fan one

[@JUMPYCOOL]

Some of my favourite lines: *DONT TOUCH THE CHILD* *I HAVE NETFLIX* *SANS DANCE* *Sr Pelo gasp* *WALUIGI* *WANNA HAVE A BAD TOM*

[@lightning77natsaydokidokis68]

Metoooo same here

[@cameronspencer9619]

And, of course… AAAAAAAAAAAAAAHHHHHHHHGGGGG!!!!!!

[@varshapatinge5022]

YOU WANNA HAVE BAD TOM!!!!!!!!!

[@nathanielw4204]

And of course the cry

[@markstephensajul8244]

How about LE ASRIEL CRIE or PAIN and GOOD PAIN

[@jeremyetremblay6663]

Sr pelo never fail to make everyone laugh

[@JUMPYCOOL]

I always die laughing watching Sr Pelo vids

[@Echolovania]

My favorite thing about the April Fools Video is that if you put on closed captioning, Pelo would go on to talk about how he felt while making the Genocide video. Edit: Oh, and in the Genocide Video, iirc there are time stamps in the description for the choices.

[@Mairusu]

Interesting haha

[@ShadiC636]

The whole reason he made the April Fools version was because of the frustration that accumulated when people kept nagging him about the Underpants Genocide video. And it clearly shows.

[@alonsox-ig5iq]

@@ShadiC636 with the song ( i love that screams )

[@DW9427]

The Gaster animation is actually one of the most serious, horrific and not-entirely-funny videos Sr Pelo has ever made, and I love it.

[@alvaroperez2349]

I remember laughing so hard at that video that my dad got pissed at me. (It was Pass my bedtime at the time.)

[@Mairusu]

loool

[@FantasyTheSloth]

Jokes on them, I don't have a bedtime..... Meaning yesterday I had not a single wink of sleep..... yeah.... I should get a bedtime.... 👀🤭

[@alvaroperez2349]

@@Mairusu btw the joke at 3:48 is that H’Critkal voices Sans in this.

[@kylarjenista5049]

@@FantasyTheSloth if only it was easier to fall asleep

[@FantasyTheSloth]

@@kylarjenista5049 Rip 😔

[@billsans3715]

This is actually the first AU (Alternate universe) people reacted to or seen. If you want to learn more about AU's than tell me anything about them but I heard you played some before. 4:42 This video is actually the original place where the meme of "DON'T TOUCH MY CHILD!" came from.

[@somename9223]

4:45

[@Lilvince3389]

What do you know about errortale?

[@Phantom17685]

Entry Number 17 is a missing entry file in the true lab. It's hidden in the game code, just like the message.

[@Lilvince3389]

But you can get it in game, just need to edit your location

[@Proud_of_Yourself]

As Sans pummeled Frisk all I could say was "Stop they're already dead!"

[@elizabethp1772]

I legit almost started crying Underpants is that hilarious

[@Mairusu]

me too lol

[@nightsky4616]

Having Sr. Pelo make Deltarune animations would be the best thing ever, nothing could make me happier

[@Mairusu]

Yeah why hasn’t he

[@firepunch4603]

@@Mairusu he's tired of making undertale parodies, because before he uploaded the genocide video, people were demanding more underpants and pelo was stressed because of that, I think?

[@the_demon149]

@@firepunch4603Also, he only did the endings for Undertale, but Deltarune isn’t even halfway through being released.

[@mlggamer5296]

That ending was exactly quote for quote what I remember seeing in the game I saw someone else discover gaster some years ago and that's the exact quotes verbatim. I like how they gave him a deeper voice so not exactly text to speech like the others but more of his own personality

[@boyshade4576]

19:45 Look at that, the icon saness when he loses in Indie Cross mod XD

[@Escanimations]

3:59 The fact everyone laughed even mairusu except pelo is just wholesome

[@ethanakers3922]

pelos baby face at 22:02 fucking kills me every damn time

[@Mairusu]

Lool

[@The.FierceDeity]

Sr pelo created such a great masterpiece, nothing can top Sr pelo. I think there is a fan animation for that disbelief papyrus timeline as well Hey also I was curious, can you possibly try out the Easter update to the d-side remixes? Apparently they added week 5, and a sonic(or mighty ig) song as well

[@jasonsparrow7737]

2:05 frisk is still genderless "Yeah, let's help him! Yeah, let's help her! Yeah, let's help help! Yeah, let's hep dep hep a dep!"

[@NorbYyY_GG]

I like your videos but in reactions you talk a bit too much you cant really hear the video :/

[@uneppai3330]

Erm... You want to watch the video go watch the video

[@nebula4585]

"Poor genderless Frisk" Frisk isn't actually genderless, as Toby Fox has announced, Frisk is whichever gender the player likes. So its either a girl or a boy, most popularly known as a girl.

[@Misto_deVito6009]

In that case, I like them to be genderless >:)

[@How-dare-you-diss-my-cheese]

I pretend frisk is a boy because I'm a boy

[@taytay6969]

when sans was getting shocked by the green wire at 4:23, you can see ness inside of him, finally, the truth

[@Mysteryman-Egg]

he made ness inside sans from the theory by matpat... and its wrong.

[@theformalfern]

Sans is ness

[@seelkadoomslayer1894]

4:52 Seeing mairusu dying was very funny and tragic

[@shadowbunz1091]

MOGOLOVONIO is the official name for SANESSSSSS's version of megalovania

[@michaelsanjose1990]

4:23 Nes is Sans theory reference. There are also other Easter eggs in that small scene.

[@MindofEmbers]

Well, once upon a time, I had a hilariously infuriating Fanbattle idea where you literally couldn't kill sans. You work through the battle, but with the tiny bit of energy he had left, he kills you, because you're on 1 hp. You can NEVER win.

[@Starlightnova111]

YES YOU ACTUALLY REACTED TO IT Underpants was, very unfortunately, my childhood, and it's cool to see you react to it

[@Beko500ProGolover]

Ultimate funny’s ensured. Underpants is the funniest thing I watched.

[@Mairusu]

it's great

[@Beko500ProGolover]

@@Mairusu agreed with that.

[@AustinSanders1980]

SANESS is by far my FAVORITE Sr. Pelo character, wish SANESS could return.

[@umbrella3235]

Fun fact: Sr Pelo (the creator of these) also made the Spooky Month videos, the series Skid and Pump originate from.

[@Mysteryman-Egg]

thats aint fun fact bro 💀

[@scratch-agunner]

It's legitamately crazy how Mairusu didn't realize he meant CritikalMoist 3:49

[@Mairusu]

Who

[@casda5226]

A youtuber

[@notelias64]

Charlie is disappointed

[@notelias64]

@penguinz0

[@notelias64]

That is Moist Critikal

[@fredbread2112]

Mairusu: Plays an FNF mod. Also Mairusu: Goes to watch/play the original.

[@CykeGames]

I'm surprised that he never watched them, glad he got around to it

[@Mairusu]

Finally eh

[@MicrowaveCosmicToast]

I was actually waiting for him to watch this, guessed it actually happened.

[@aliceandbendyadventuresint7811]

20:34 that's me literally screaming when I can't find any Dame Agatha books since she was called the worlds #1 best murder mystery novelist for writing Hercule Poirot and Miss Marple novels in a library

[@randomnessanimation6831]

Sr Pelo’s Underpants series was the best thing I’ve watched when I was a kid!

[@Mairusu]

Haha for sure

[@mlggamer5296]

Sr Pelo is just like us we wanted to leave the room the moment we saw Chara. I remember how creeped I felt when I first saw the genocide ending

[@DericksUniverseIsBack]

He missed her head split open because he was laughing

[@zacheryvincentcallahan4485]

You forgot the reset ending. At the end of the genocide video they ask you why you are still here and give you a chance to bring it back. You totally missed that.

[@Mairusu]

Woops

[@mlggamer5296]

Okay I had to slow the footage down really slow to 0.25 I just saw gaster now. I guess he's supporting him hence he's able to do the gaster blasters and have all that power

[@K1LL_Sans]

I remeber the good old days when there was alot of reactions on undertale animations and this was one of them thx mairusu you gave me nostalga

[@Mairusu]

No prob hope you enjoyed

[@BigPaulski42]

You should totally do another video or two on Undercards! You are the main reason why I found it in the first place! They have added so many new cards, including Deltarune! I think it would be really cool to see you even just look at all of the cards, card skins, and other things they have added in the past several years!

[@Mairusu]

Could be interesting

[@mlggamer5296]

The way that he voices Frisk whenever he's like screaming does it remind you of Tom and Jerry whenever Tom gets hit by something and he screams? Tell me I'm not the only one who picks this up

[@mlggamer5296]

Oh yes "don't touch the child" the ever iconic words that made the internet go wild

[@Mairusu]

A legendary meme

[@Deltale]

This gives me nostalgia and a ton of tons of entertainment. Thank you

[@DericksUniverseIsBack]

A lot of tables were harmed in the making in this.

[@mlggamer5296]

Frisk had that cheeky face once he realized what he said. That's the "oh yeah you just played yourself" face

[@FantasyTheSloth]

I love your videos Mairusu! I'm happy your reacting to this lol

[@Mairusu]

thanks means a lot!

[@FantasyTheSloth]

@@Mairusu 😁

[@aliceandbendyadventuresint7811]

10:05 Look it's my favorite Undertale AU character !SANESS!

[@Mairusu]

Mine too

[@aliceandbendyadventuresint7811]

@@Mairusu !DO YOU WANNA HAVE A BAD TOM! - SANESS

[@SpringyGirl69]

19:43 this gets me everytime

[@Mairusu]

Hahahhaa

[@Misto_deVito6009]

Ikr

[@luigipowdemo6458]

If you were to go to the description, you could choose.

[@GooseMan11]

If you liked these you should react to the fan made disbelief animation it is absolutely hilarious.

[@mrbear6849]

0% Mairusu will find Me comment

[@Mr.clownman62]

True

[@lmao._.bruh20]

I remember watching these when they came out- And UNDERCARDS? I still play it :D I got Undertale and have yet to get this ending lmao

[@exi_m7074]

Oh shoot! undercards! That’s a blast to the past.

[@lmao._.bruh20]

@@exi_m7074 FR-

[@JC_Stone]

The version of Megalovania that’s used during the April Fools video is called “Mogolovonio”

[@maroonknight5252]

The name for Underpants's Megalovania is Mogolovonio.

[@Mairusu]

Is it lol

[@PallateRoller]

Frisk: lalalala Random person: COME HERE BOI!!! Me: Noooo

[@Sellout5]

The good old days

[@Mairusu]

Yeah

[@brayw9911]

Closet didn't help papyrus call them HE DIALED ALL NUMBER IN ORDER LIKE WITH US

[@snuuzzyy]

There's a parody of Underpants for disbelief papyrus, and you gotta watch.

[@Mairusu]

Realy

[@Fredbearishere]

​@@Mairusu yes

[@mlggamer5296]

Looks like Sans touch the child. Too bad toriel wasn't around for this one

[@Arcoos940]

In the don't touch the child part him:dying peacefully Me:trying not to do the same but still does it 🤣

[@NotAPerson343]

Funny how Sr Pelo was the creator of ‘the child’

[@bruh71812]

Did anyone notice that when sans Barney and undyne where getting shocked they didn't have a full skeleton or something else

[@mlggamer5296]

Okay now I know where Sans Dance comes from. That's his special ladies and gentlemen

[@BobJeffEllo]

W frisk (frisk don’t give a frick when he reminds sans about papyrus being dead)

[@Chucky_Martinez]

Sans saying "It'z Critikal" refers to a Twitch Streamer "Moist Critikal" who is pretty famous.

[@MoofAloof]

(*me trying to read the text backwards just because I can*)

[@Mairusu]

Hahah

[@CR1MSONACE]

(*nac I esuaceb tsuj sdrawkcab txet eht daer ot gniyrt em*)

[@MoofAloof]

@@CR1MSONACE Haha, that took way more work to do than my comment.

[@nootnoot2573]

12:59 gaster was there because that was one on the many gasters in that genocide video for a puzzle in the gaster video

[@Not_Hisenberg]

So basically ur playing/watching Undertale but it's dumb and stupid nice also can u watch eddsworld just a bit crazy and also eddsworld fan service 1 and 2 also theres these fan things tomsworld tordsworld and mattsworld u can search them up and also watch them there's this series someone made and it has swear words but just bleep it out

[@Mairusu]

Pretty much

[@paulclark5574]

Bruh the words are backwards 😂 👇

[@Mrpamonhadechcolatejoga]

why does nobory says that when sans get chocked appears ness inside?

[@mlggamer5296]

Wow the souls made him extra swole one slap and flowey was down. I didn't know Frisk had it in him

[@WorthyEpert1]

I wanted to let you know that someone made a fan animation that is similar to Underpants but it is about a fan made boss fight called Disbelief where instead of sans being the final fight it is Papyrus and I think you should react to it

[@Mairusu]

Oooo

[@Dr.Bright17]

The whole 17 thing is actually two separate files - one by Alphys about stuff we already knew about to an extent and another one by Gaster written in Wing Dings, which said the whole ‘Dark, Darker, Yet Darker’ thing he went on about in that video

[@человек-к4т2л]

I miss and at the same time not KZbin annotations cuz they filled up the screen

[@woomytheoctoling]

Hey you should react to the fan made underpants animations like underpants: disbelief

[@Mairusu]

Could do!

[@epicsand8185]

No one gets the reference to penguinz0 sans makes anymore

[@duncan_potter2860]

Wait, where's the intro, the description says you reacted to it but I don't see it.

[@Mairusu]

I did but I forgot I trimmed it out due to copy right

[@GameIdiots69]

These videos are copyrighted?!

[@Mairusu]

yeah, which is super weird. it's from "channel frederator". also the undertale OST gets hit alot aswell, which makes no sense either. a big pain

[@fireboi5968]

Why you freaking swapped this screen or else

[@Radio_Tempo]

Since you mentioned aus, you could react to the au themes! There's a compilation on youtube of them

[@Mairusu]

Really? Sounds cool

[@Denji_JakeTMF]

Lol this is super funny xd

[@Mairusu]

yes

[@Rhythm_Pengyin]

Did u know: in the true ending of underpants when sans is electrocuted or smth like that, u see a human in him Sans is ness? HMmMmmmmM *thinking intensifies* Oh also undyne is wearing a fish costume u can see that when she gets electrocuted too

[@Mairusu]

Weird

[@destrocore50]

It's a reference to Game Theory's joke video saying Sans is Ness

[@johnathancastillo8200]

the gatser part a has a reference to vhs sans if u listen closely

[@kratos_benjamin]

This and mokey boosted sr pelo's Channel like fucking ROCKET FUEL

[@Mairusu]

He deserves it

[@painfulflower25]

If you want to know, the song for sanesssss is mogolovonio

[@AverageBalkanian]

I like how flowey had an imitation damage and frisk didn't give a freak

[@Snoopy106]

Hey I recommend you react to RecD and JunoSongs. They make lyrics of fnf and other songs you might even learn some lore, I recommend you watch Bob mod with lyrics on RecD, for April fools, and it’s funny

[@Mairusu]

maybe!

[@awesomebluetoad8945]

Easter egg: if you pause at the right time near 4:23-4:25 you can see Sans is Ness.

[@tommygurl29061]

And papyrus has a skeleton in him

[@Nightmarrione]

Cool vid but why was there a mirror like effect

[@putuayu7176]

Im stuck fighting undyne in genocide route =)

[@shroomso4430]

Sr Pelo himself hates Underpants, kinda funny

[@SnakeArtists]

all these voices and screams all done by sr pelo himself since he done a lot of them ( mostly with the mokey one lol )

[@Mairusu]

What a Chad

[@jakique]

I've never seen mairusu laugh that much before 4:51

[@BaronTheBarberTv]

I know right? It’s that funny.

[@DEMSH00T3R]

Sans said “Hey guys. It’s CR1T1KA- I mean sans.” This is a reference to Moist Critikal also known as Penguinz0

[@Mairusu]

Oh

[@MelonPG_YT23]

The megalomania is called mogolovonio

[@denizyazici1311]

this video gave me super luck thanksssssss!!!

[@yuriangeltingmeimei573]

I not be sans and First heart not Oh my Goodness so not you Undertale so happy First heart so my heart flower is my heart so nice so beautiful not so you be is a Movie Videos work So good so flower Dies so cool Not you me the best so ye shall I not the name so very good Amazing Undertale so cute So happy Undertale chan vs First So well not you be maybe Ross is a KZbin be so good So nice

[@Fruitishboi]

Oh no... Sans dans is to powerful... Nnooooooooooo