Sonic the Hedgehog is a platforming action video game. Developed by Sonic Team in 1991, the blue blur himself would become one of gaming's universal icons, and became the first series to stand as a serious rival to Nintendo's Mario series, flaming the legendary console wars.

A classic 2-D side-scrolling platformer, you control Sonic, a blue-colored hedgehog that runs pretty darn fast across the stages (zones as they are called in the game). Scattered throughout the zones are golden rings that Sonic can collect, which allows him to not only take damage, but allow access to special stages. If completed, the special stage will grant Sonic one of six Chaos Emeralds.

Dr. Ivo Robotnik, an evil genius, realizes the power of the Chaos Emeralds, and wants them for himself. As such, Robotnik traps the innocent woodland creatures of South Island. In response, Sonic attempts to free the creatures and collect the emeralds for himself in order to stop Robotnik's plans.

Luigi took a wrong warp and landed straight into Sonic 1!

Moves:
Green Missile: Up + B (couldn't add RNG to it)
High Jump: A
Ground Pound: Down + B
Swim: A/B/C Underwater (duh)
Faster Swim/Exit water: Up + A/B/C Underwater

There's a bug where you can clip through springs by holding Down. Shouldn't affect gameplay too much. Also, if you ever have trouble beating a level, sit still for a while, you might beat the level as if it was absolutely nothing.

Rev01, fixed a few issues:
Ground Pound is now Down + B
Fixed Luigi's diagonal walk and ending sprites
Luigi can now actually beat the full game by doing absolutely nothing
Can no longer ground pound or green missile underwater

source ROM: Sonic The Hedgehog (USA, Europe).md
CRC-32: F9394E97

patched ROM: Luigi_In_Sonic_1Rev01.bin
CRC-32: F3B7438A