Spike and Dash are in Sonic 2 for Genesis. It was a hack i did took 2 days for me too finish it. Dash's color looks a little off. Its version 1 in the next version there maybe music change and Stage name change. Sonic 2 is a ROM so you need a SEGA Genesis Emulator to run it. I recommend Gens32 and Fusion36 they are easy to use.

Gens32 Download: [link]
Fusion36 Download: [link]

Spike & Dash in Sonic 2 V1 Download: [link]