Damn, guess I gotta get a gamecube... or a Wii, Thank you everyone for the help

so is the dolphin emulator a Unofficial emulation?

I did, aparently "Unofficial emulation" is not allowed. What is that is that refering to using a ISO that doesn't belong to me?

I'm thinking about getting into speedrunning, but I have an issue, I own a physical copy of a game that I'm thinking about speedrunning, but I don't own the system it runs on (gamecube), my question is, can I speedrun that game from the dolphin emulator?