Gyrokinetic Mech is Allen Stark's Ultimate Attack in Vengeance: Dawn of Oblivion. It is a revamped version of his Level 3 Super Move seen in Brawl Super-Star Legends. A brief cinematic plays in which two cars drive up, as Allen transforms them into a mech suit. While in the Mech, Allen's moveset changes. This form does not have special abilities as they are replaced by a special attack. The transformation will only last until Allen's Hero Gauge is drained, and will automatically end if he uses his special attack.
- Mecha-Stomp (Weak): Allen's Mech stomps its feet, causing a bit of knockback.
- Grill Launcher (Strong): Allen's Mech fires a vehicle's grill at the opponents
- Bouncing Tires (Ranged): Allen's Mech fires a scattered shot of vehicle tires. Once shot, the tires will bounce around the stage, and will occasionally ricochet off of walls and buildings.
- Emergency Eject (Special): Allen will eject from his mech as it charges ahead and comes to an abrupt stop. Afterward, it self-destructs.