Pokemon Trainer. You're good with all three of them and you know when to switch; it'd harder for you to prepare.
That said, don't be afraid to switch to Wolf for a game or two to confuse people.
Vs Bobby, use Pokemon Trainer.
Vs Lefty, use Wolf, maybe Pokemon Trainer if things go awry.
Vs Ranil, use whoever you want xD
Vs Tally, use Wolf, and again Pokemon Trainer as a backup.