I got this idea from an animation I started (I intend to finish it!)
Think of a villain (from a game or film or anything else) and think of six Pokemon he/she could have! The first Pokemon has to be a starter from any game, and it can be in it's evolved form if you want!
Bowser:
Swampert, Skarmory, Mightyena, Haunter, Aggron, and Psyduck.