Mecha Mario

Mecha Mario is a robotic doppleganger of Mario and is a secret weapon created by Dr. Eggman under a comission from Bowser. He has all of the same moves as the real Mario, but has weaponry which, in a way, makes him superior to Mario.

Mecha Sonic Saga
Mecha Mario first appears in Episode 7, where Eggman is shown to be completing it. It is revealed that Mecha Mario was created for Bowser under a comission.