Early game · first 8 minutes
Use Grapple Arm when Rat King steps clear of his troopers. After a missed hook, move away from Scrap Grenade and reload behind cover.
Bebop vs Rat King
What's giving you trouble?
Full matchup plan
Mid game · Walkers
Hook Rat King toward your teammates after Royal Pestments breaks or expires. Attach Sticky Bomb and aim Exploding Uppercut toward a wall so he stays within reach.
Late game · Patron
Use Hyper Beam far enough from Rat King that he cannot reach you by slamming his banner down. If his team advances toward you, end the beam and move back before they can interrupt it.