It is not possible to T.T stomp into all bosses. The trick is not possible to perform in hover, so Bubbler can't be beaten that way. The loading zone for the 2nd boss race only exists after you have beaten the coin challenges, so that would also be something that makes this impossible. All versions of the game are under the same category, making another Any% category for 1.0 would just be too arbitrary. I understand that it sucks that you bought the 1.0 version, but we are not gonna change that. The JP version is always gonna be the best, so aim on getting that one! It's possible to play it on your American console if you do a small physical mod on the cart or the console.