i used Dolphin and the games that are allowed with a gamecube version are:

https://www.speedrun.com/teenage_mutant_ninja_turtles_2003 https://www.speedrun.com/tmnt2bn#Solo_NG%2B https://www.speedrun.com/tmnt_mutant_melee https://www.speedrun.com/tmnt_2007#Any

Why are emulated runs for this game banned?

Just did a run of it and was about to submit it and then i read the other tab for the rules and says emulators for the game are banned.

The previous games before this are allowed and other titles allow it as well, even the arcade game.