Macho Brace: Torchic for now, but I switch it around
Exp. Share: Trapinch (way ahead of you)

Cleanse Tag: Lead pokemon
Amulet Coin: Second in party
I also have various berries I usually put on before a gym battle, usually Sitris (heal 30 HP), Persim (heal confusion), and Cheri/Chesto/Pecha/Rawst/Aspear depending on who I'm fighting.
I'm also working towards a Shell Bell.
And, yeah, I've been concidering switching out Imprison for another attack move (preferably not psychic-type)
EDIT: Probably Shadow ball, just to mess with the other Psychics.