042D2590 42800030
042D42B4 428000B0
042E2414 4280001C
042D3448 4280002C
GameCube - PAL (But shouldn't matter)
This AR code will open up the full character select roster when playing a Mapmaker map in story mode, letting you play characters other than Cortez. Preview mode doesn't open char select so you're still locked to Cortez there.
No issues as far as I can tell besides a few characters' arms looking weird with the Temporal Uplink which isn't surprising.
It is pretty cursed to see other characters wielding the Uplink even when it "works" though.
This code was almost several lines longer because I thought I had to write a bunch of custom assembly and jump around at one point but it turned out one of my offsets was just off by 4