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A Sonic 2 hack made by MainMemoryThis hack adds the Drop Dash from Sonic Mania into Sonic 2 for the Sega Mega Drive. While playing as Sonic, you can perform a Drop Dash by jumping, then pressing and holding a jump button until you touch the ground.

Eggman the Dictator in Sonic the Hedgehog (aka Eggman in Sonic 1) is a rather interesting hack of Sonic the Hedgehog made by L0st - Sonic is replaced byEggman, who runs through the stages. Due to Eggman's larger sprites, the mappings and collision engine were rewritten from scratch, and Eggman also jumps at the same height and runs at the same speed, above and below water. As a result, Eggman cannot collect rings, open item boxes, destroy enemies, be hurt by objects or drown—the only way to kill Eggman is by landing on spikes, getting crushed, or falling off the screen (all three of which require a reset). Because of this, the hack is little more than a novelty, but is an impressive one nonetheless. Eggman can't use debug mode either, but Level Select still works. Also the Special Stages are unchanged, as Eggman can't enter Special Stages from the main game.

Flicky (フリッキー) is an arcade game made by Sega. First released in arcades in 1984, Flicky was also released at the time for the SG-1000, and then ported to the MSX and Japanese computers Sharp X1, Fujitsu FM-7 and NEC PC-8801. It was later ported to the Sega Mega Drive/Genesis in 1991. Flicky was designed by Yoji Ishii, who was with Sonic Team until August 1999, when he formed Artoon, his own company.