I'm building a squad that includes Darth Sidious and a Felcor. I plan to Pawn the Felcor so it can move up and attack something then use its own activation to triple the same target and Regen its Pawn damage. On the chance I don't need to move on the Pawn turn can the Felcor use regen?

Yes, because Pawn grants a turn, and Regen triggers on a turn.