Hey mate, sorry for the late reply! If you do a run using the GameCube version of TY 3, even if it's played on a Wii, you should be fine just selecting GC. Perhaps just add as a comment that it was played on the Wii. If we decide later to revise and add an option, it can just be edited to reflect that.

there's not much point really, considering the only difference it would make is not being able to do black stump death warp, it's not enough to consider an entire new category.

+1 this, him and myself had done a run earlier and would like to submit it, but couldn't due to lack of the category.