- "Anonymous Maximus" is an unnamed Autobot from the Energon portion of the Unicron Trilogy continuity family.
Physically he is identical to his brother in every way. You'd think that would cause confusion, wouldn't you?
Long ago, during a time when the Decepticons and Autobots were at peace, Anonymous Maximus, his brother Superion Maximus, and the Decepticons Constructicon Maximus and Bruticus Maximus were tasked with guarding the Super Energon Temple. The Autobots and Decepticons glared at one another in mutual acrimony until they became completely corroded and were unable to move.
In the year 2020, Megatron, guided by Unicron's voice within him, discovered the Super Energon Temple. Confronted by the four rusted guardians, he destroyed Anonymous Maximus to force them to acknowledge him. Superion Maximus was horrified when he awoke, and he fled rather than serve Megatron.
Some time later when Superion, having been reduced to his central component after defeating Constructicon Maximus, was being savagely beaten by Bruticus Maximus, Anonymous Maximus's ghost appeared to save his little brother. He blasted Bruticus Maximus, destroying his left arm in the process. With his brother momentarily safe, Anonymous Maximus gave him a reassuring smile and faded away.