- nathanisbored discovers item swap
- willdabeast discovers coin item swap
- nathanisbored figures out chuck crashes game (and inadvertently cloud but not related to this)
- masterjun debugs crash > figures out how to manipulate open bus to jump to controller ports for the 42-second TAS
- jeffw reverse engineers masterjun's run, figures out a way to manipulate open-bus and set up code in real time, and produces the glitch on emulator
- sethbling improves on jeffw's run by removing YI1 from the setup, and produces the glitch on console
- dotsarecool and nathanisbored improve on the run by removing the need for the item box mushroom altogether


the "japanese TASer" you were thinking of was probably ism140, who was the one that figured out cloud could manipulate bowser (in super demo world however, which has a way to get cloud in there without glitches). it's not really related to the credits glitch, though