Fortress Maximus

Fortress Maximus is a Titan, and the largest Autobot. He is operated by Cerebros, who transforms into his head. He uses his colossal size, strength, and alternate modes to help the Autobots. He cares deeply about his fellow Autobots, and will help them at any given opportunity. He sometimes goes by the abbreviated name Fort Max.

 Beast Planet Arc 

During the battle with the Combaticons, Fortress Maximus arrives and quickly defeats Bruticus. However, he is hit by Starscream's ray-gun, making him unable to transform into robot mode. He is in his battle station mode for the rest of the time. Springer's team goes to find parts to fix his transformation module.

 Shockwave's Revenge Arc 

When Springer's team returns with his transformation module, he is in his base mode. During the fight against Shockwave, the Autobots are under fire, but Hexatron, Jetfire, Kup, and Cerebros arrive to turn the tide of the battle. After Sixshot defeats Jetfire, Cerebros uses the reactivated Fortress Maximus body, and Fortress Maximus is reawakened. He picks up and throws Quake, and he attempts to shoot Sixshot, but he teleports away. Jazz thanks Fortress Maximus for saving them.

 The Galvatron Crisis Arc 

Fortress Maximus is in his mobile base mode when Blaster picks up the Chaar team. He stays in that mode during the Final Battle.