after you defeated Paintmaster and a bunch of other stage, You arrived at the rocket arena. The Red Team was looking at You. They were waiting for you. And Their Bomb Maniac Boss. jetrock.

Jetrock: Oh! you arrived.

Red Rocket Battler: preparing his rocket.

Red Bomb Battler: i cant wait to Bomb myself up.

Red Trowel Battler: eh..i just wanna to build my wall.