Unfortunately, for the same reasons that they split Zelda/Shiek and Samus/ZSS, and made Charizard a Stand-Alone character, they don't like transforming characters any more.
So Charmy would be more like Luma, with Espio and Vector acting more like Duck Hunt.
Neutral Special: Bee Bomber: Charmy is thrown by Vector as a ranged Projectile. Charmy can attack independently, but can also be KOd easily!
Side Special: Charmy Sting: Charmy attacks with a sharp stinger, dealing little damage but paralyzing foes briefly.
Up Special: Bubblegum Bomb: Vector and Espio rise into the air on a big balloon of bubblegum. It will explode for major damage at the end, or if attacked!
Down Special: Ninja Stealth: Vector cloaks himself and Vector, becoming invisible. Being caught in the smoke can stun foes temporarily, but attacking will uncloak you!
Final Smash: Band Beat-Up: The Chaotix Crew splits up and runs randomly all over the screen, beating everyone up with instruments. Guest appearances by Mighty, Knuckles, and some others. Like, there's seven Chaotix Crew members beating up everyone. Espio, Vector, and Charmy all return to their previous locations at the end of the Final Smash.
Heck, I didn't hate Chaotix at all. after I beat team Rose (because easy, easy easy), I always beat Chaotix next. Yeah, the Mansion was tough, but I always hated the Mansion for all four teams. It was the jungle, though, that always pissed me off.