Paper Mario: TTYD - "Pennington"

The PAL version of the game ships the code for the test maps of the developers. By reconstructing the map files for these, we can check what's in them. The Goombas in a row is just my reconstruction and not necessarily what it originally looked like. One of them contains test battles for a number of enemies in the game. Additionally, there's some test battles which are somewhat weirder, among them "Pennington", from a battle which appears to have been used by Kazuhiro Tamura (credited for Battle Programming) for testing.
After defeating the enemy, a new one will spawn in its place along with speaking a dialogue line, and funnily enough, this happens in other battles too. I'm not sure if this is by design or a bug. The dialogue looks corrupt presumably because the text is Japanese but the font of the PAL version is used here.

[@superangyo01]

I learned about this guy from Muz Yoshi's video. This is pretty hilarious honestly

[@KCEXE]

Pennington

[@johnrainsman6650]

Can you get Bowser and Kammy to fight Grodus and Crump in the Palace of Shadow? Or make a barbeque party outside the Riddle Tower, with Mario, partners, Peach and Frankly?

[@mariomadproductions]

That's pretty funny

[@Lion_Unused]

This is very interesting. I want to make a video for Japanese people, but is this a modified version of tst.rel? I have the Japanese demo version, so I have tst.rel. If you don't mind, please tell me how to modify it.

[@Getlucky12]

Would it be possible to like, change the font back to Japanese and see if the text fixes itself?

[@PistonMiner]

I've added the disassembled evt code along with the printed messages here: gist.github.com/PistonMiner/cf4c24ca7f227546988e43c3dc1a447f