White Sonic in Sonic & Knuckles
Modern Sonic in Sonic 2
Sonic the Hedgehog & Miles "Tails" Prower the Fox in Knuckles the Echidna in Sonic the Hedgehog 2
Virtua Hamster (USA) (Proto)
Sonic 1 - Unfinished Example Remade (Final Release)
Sonic the Hedgehog Painful World Spikes Kaizo 2