yeah i dont think fox gets his own tier either. fox is really good sure but stop there imo. lots of chars are super potent but also have very real limitations that other people underrate from lack of experience playing as them.
i feel like diddy, rob, falco, and lucario (maybe shiek?) could all swap around tier placings well enough.
everyone else looks alright. maybe sonic and zss a bit higher, but that's just feels.