Allowing Fox but not his clones is an interesting choice, and you must really hate fire flowers to ban them twice.
This thread just gave me an idea: Final Destination, Space Animals only, only Smash Balls turned on with item frequency set to very high. Battle of the Landmasters! It's probably been done before but sounds like it could be fun for a while, like when a friend and I tried to get the lowest possible distance in Home Run Contest in Melee while getting more than zero.