Sonic 2 (8-bit): Sliver Sonic
Sonic 2: Robo Sonic
Sonic CD: Metal Sonic (duh)
Sonic & knuckles: Mecha Sonic
Sonic the fighters: Metal Sonic Model No.29, code name: Rocket Metal
Sonic Adventure: Mecha Sonic MK ll
Sonic Mania: Silver Sonic MK ll
(I only listed robot who l thought had some confusion around them)
