Collecting every weapon and item in Cave Story with glitches, in

Cave Story is 15 years old now! To celebrate the occasion, I decided to do a run that showcases (almost) all of what the game has to offer. In the process, I also completely and shamelessly break Nicalis's latest rendition of this classic game.
This speedrun has the following features:
• Collects all Life Capsules and missile chests (from their source)
• Collects EVERY (!!) weapon in the game (although I lose the Polar Star, Fireball, and regular Missile Launcher in the process)
• Collects every single item in the game (including both Boosters (!!)), except for the Turbocharge and Whimsical Star. (Unfortunately, there's no way to use the drowning glitch to obtain any of Chaba's items.)
I also decided to max out my HP capacity (232 is as high as the game lets you go), not because I made that a rule for myself but just because I felt like doing it. I could have also gotten unlimited missile expansions, but I didn't feel like doing that. :P
The run itself has its ups and downs (mostly downs tbh :3). You can see me really struggling to juggle between my 7 weapons at the end, but at least I somehow still managed to get a sub-3 Hell, so I'm happy with that :)
In any case, my main purpose in doing this run was to showcase some of what the Core Escape drowning glitch lets you do in the Switch version. For a full comprehensive list of what you can do with this glitch, see this: www.speedrun.com/cave_story_p...
Q&A:
Q: What is this voodoo magic??!?
A: Read this: www.speedrun.com/cave_story_p...
And then read this: www.speedrun.com/cave_story_p...
And finally read this: www.speedrun.com/cave_story_p...
Q: Why are you playing on original graphics?
A: For some reason, the block in the jail that's supposed to stop you from entering/exiting doesn't have collision when original graphics are turned on. I don't know why this happens, but it saves me from having to talk to Mahin to break out of jail so it's a few seconds faster. There's no other difference that I know of between original vs. remastered graphics.
Q: Why are you playing with Famitracks music?
A: Why not?
Q: Why did you talk to Momorin after finishing the rocket? You still had the Booster v2.0!
A: Unfortunately, I have to lose the Mimiga Mask before talking to Curly in the Plantation, otherwise the Cthulhu won't tell me about Ma Pignon and I won't be able to fight that boss. I also can't do the rocket quest after saving Curly, because I have to ditch the Booster v0.8 before returning to the Core to save Curly, otherwise she won't appear at all in the Plantation, even if I drain the water from her and carry her out of the Waterway. (The end of the Ironhead fight checks for the Booster v0.8 and skips setting that flag if you have it.)
Q: Did you really have to replay half of the game in Curly Story to do all of that?
A: Once I've left Dark Place after doing Core Escape, The only way to re-enter is by loading Dark Place on another save file and then doing what I did in the run. I have to re-enter in order to complete the run because I need the Iron Bond to enter Hell (to get the Life Capsule and missile chest in Hell), and I unfortunately can't get an Iron Bond through glitching so I have to get it the intended way by saving Curly.
As for why I used Curly Story in particular, the setup for glitching the Booster v0.8 into my inventory requires me to load Curly Story's Plantation TSC. It also conveniently allows me to warp directly to Assembly Hall after the Core fight, right next to where I can get the Bubbline.
Q: Would it have been faster to keep the Polar Star and trade it for the Snake the first time you enter the Labyrinth, and then obtain the Machine Gun later with glitches?
A: Probably! The main reason I went for the Machine Gun first was because I'm not good at going through Sand Zone without being able to fly. I also really wanted to showcase the +26 infinite life capsule setup, which means I would have had to trek to Labyrinth I anyways. :P
00:00 Start
23:59 Core Escape
25:01 Start auxiliary playthrough
26:46 Labyrinth Escape on main file
27:23 Continue auxiliary playthrough
49:19 Core Escape on auxiliary file
50:21 Get Booster v0.8
51:59 Get Booster v2.0
52:37 Get Mr. Little
53:27 Get Polar Star, trade for Snake
55:07 Get lots of HP
57:26 Travel to Egg Corridor? on auxiliary file
1:00:11 Plantation access on main file (get Nemesis)
1:02:28 Get Spur
1:02:58 Start rocket quest (to remove Booster v0.8)
1:04:10 Get another Blade
1:05:30 Unglitch game and return to Core
1:06:27 Finish the game "normally"

[@KirbCakesEvie]

Damn I wish I knew about this glitch before it got patched. Would've been so cool to have a file with all weapons.

[@PretzelBS]

:O

[@Garou235]

Oye eres muy pro

[@Robbie1219lel]

Does the glitches work on Nintendo switch but the e shop version

[@periwinkle.]

You need v1.2 of the game to do this. Since v1.3 the glitch that enables all of this to be possible has been patched out.

[@Robbie1219lel]

Okay

[@ChadMichael33]

So that’s how you play this game

[@emmyheart2082]

Is this glitch possible in either the Freeware or CS+ versions for the PC?

[@periwinkle.]

Short answer: No, it's not. Slightly longer answer: No, because the glitch relied on a bug with the cutscene skip feature, which only the Switch version has. In fact, that cutscene skip bug was fixed in the v1.3 patch, so you can't do it on Switch now either. Long answer: Depends on which glitch you're talking about. There are two glitches used in this video: The first is the aforementioned cutscene skip bug, which only exists on v1.2 (specifically) of the Switch version. This is used to escape the Core room with "flag 4000" active, which controls the alternate drowning behavior (running a cutscene instead of drowning). The second glitch is the wonky behavior that occurs when trying to run an event/cutscene that doesn't exist in the current map (in this case, the Core drowning cutscene controlled by flag 4000), which is what I manipulate in the video to give me all of the items I want. This glitch is caused by a lack of error-checking and bounds-checking stemming all the way back to the original freeware code, but as it never comes up normally, Nicalis probably never saw a reason to fix it and thus the issue theoretically should exist in every CS version. You can mess around with this glitch yourself by editing your save file to set flag 4000 (I don't feel like explaining how to do that right now), although I should also note that the behavior you get will likely be different in every version so you probably won't be able to replicate this video exactly on PC.

[@yes-wh4jg]

How does this glitch works? Is this glitch still possible? Kinda want to do it now

[@yes-wh4jg]

Just saw the comments... Fuck

[@Garou235]

Me puedes decir cómo royos ases para lo del cofre osea nos ahogamos y después lo asemos abajo o como que no entendí

[@Garou235]

Lo de abajo osea para agarrar cosas

[@NORAMA01]

patching bugs like this in games with no online play just makes the game worse

[@Heinz_Egbert]

so true honestly, like who does it even affect, completely meaningless to patch fun tricks like these

[@periwinkle.]

In this case, this bug was actually fixed in the Japanese version (which released later than in the West) long before anybody discovered how to exploit it. Given Nicalis's track record with updating this game, it probably would have remained unpatched in the NA and EU versions, if not for a Switch firmware update that broke the challenges. Nicalis then issued a patch that fixed the issue from their end, and as part of that patch, they also brought over all of the changes made to the Japanese version, which includes the fix to this bug.

[@NORAMA01]

@@Heinz_Egbert having fun in ways not intended by the developers?! BLASPHEMY