1. Platform
2. Nintendo Gamecube

Gamecube games played on the Nintendo Wii via backwards compatibility are acceptable for both score runs and speedruns.
Score run:
https://www.twingalaxies.com/showthread.php/172766

Speedrun:
https://www.twingalaxies.com/showthread.php/143496


Gamecube games played via Nintendont are acceptable for submissions. Must show that the cheats are turned off.
This example has an NTSC-U backup being played on an NTSC-U Wii:
https://www.twingalaxies.com/showthread.php/195197

Nintendont compatibility list:
https://wiki.gbatemp.net/wiki/Ninten...atibility_List


Need confirmation about the following:
PAL backups on NTSC-U/JP
JPN backups on US or PAL consoles