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

Super Mario Bros 2

The oddest Mario game ever produced. Play as Princess with her incredible jumping skills or Mario, Luigi, Toad, or Princess.
Sonic 2 Kaizo

Sonic 2 Kaizo

REALLY challenging Sonic 2 is included in a continuation of the Kaizo series. all new levels and traps.
Sonic the Hedgehog 2 GG

Sonic the Hedgehog 2 GG

The Game Gear version offers harder gameplay in tighter spaces and a different soundtrack as well.
Sonic Scene Creator v1

Sonic Scene Creator v1

This is version 1 of the Sonic Scene Creator. Build custom scenes with Sonic characters.
Sonic Blast GG

Sonic Blast GG

15 levels let you command Sonic and Knuckles as you battle Dr. Robotnik.
Sonic 3D Snowboard

Sonic 3D Snowboard

Perform a variety of jumps and tricks on the frozen alps as Sonic rides his trusty snowboard over 15 well placed ramps