Cackling Cat

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Sonic the Hedgehog from Sonic 3 but with Sonic 1's pallete with flat colors.
Super Sonic from Sonic 2 but with Sonic 3's pallete with flat colors.
Super Sonic from Sonic 2 but with Sonic 3's Hyper Sonic pallete with flat colors.
Shadow the Hedgehog: The Ultimate Life Form aka Edgy the Hedgey based on Sonic 3's Sonic design.