Amy Rose in Sonic 1 Game
For all the Amy Rose enthusiasts out there, there is a fun rom hack called Amy Rose in Sonic the Hedgehog (you know who you are). She possesses a large hammer to smash foes with in addition to being able to sprint and jump like Sonic. When she swings it, it even spits out hearts. Cute.

Super Mario Bros 2

Sonic 2 Kaizo

Sonic the Hedgehog 2 GG

Sonic Scene Creator v1

Sonic Blast GG
