Sunspot vs Wolverine
For their first encounter, Wolverine can't use his claws and Robert can amp his strength but isn't allowed to fly or fire blasts of heat or concussive force.
For their second encounter both characters can go all out and can use all of their powers. Total blood-lust is on, but incapacitation also counts as a win. The fight starts in an inner city ghetto.
Edit: This is current Robert.