This is a hack of Sonic the Hedgehog 2 for Sega Genesis that adds features from Sonic 3 into it. The features are:

Features

• Slightly redesigned Title Screen.
• Knuckles is playable with all his moves from Sonic & Knuckles.
• File select screen ported.
• All item monitors from Sonic 3.
• Sonic & Tails now use Sonic 3 sprites.
• Moves can be done by pressing jump while in mid-air with or without shields.
• Tails can now fly/swim. However, he cannot pick up Sonic in “Sonic & Tails” mode.
• Super transformation is activated by pressing jump while in mid-air and the Super transformation glitch at the end of levels is removed.
• Transitions between acts and zones.
• Early levels have mini-bosses between Act 1 and Act 2. Sonic & Knuckles mini-boss music plays here.
• Early levels have signposts at the end of act 1 that fall down from the top of the screen along with item monitors that can be revealed when a sign lands on it.
• Some zones have different Act 1 and Act 2 music.
• The 2 player VS option is removed.
• The level select menu is not activated by pressing A+Start on the “1 Player” option, a la Sonic 3.
• A original feature: the HUD is changed so that it displays the current powerup(s) and if playing as Super Sonic/Super Knuckles the HUD displays an invincibility icon.

The patch is in xdelta format due to shifted data resulting in IPS patches containing original code. The ROM should be in BIN format.

• No-Intro Name: Sonic The Hedgehog 2 (World) (Rev A)
• (No-Intro version 20130710-102701)
• ROM/File SHA-1: 8BCA5DCEF1AF3E00098666FD892DC1C2A76333F9