Gamecube, the wiimote doesnt work if you have a gc controller plugged in port 1.
And a lot of the text is in japanese, like the dialogs after victories or the ending sequences.
The main menu is in japanese aswell, but its completely katakana + the character on the left kinda says what mode it is if you highlight it, but if you know some katakana you should be fine.
the options/pause menu are completely english though .
I think english text for at least character names are buried somewhere deep in the game, since early footage of the game showed fully english names.