Sonic the Hedgehog 2 is a platforming action video game. Developed by Sonic Team and Sega Technical Institute in 1992, it introduces new mechanics to the series, and the lovable young fox known as Miles "Tails" Prower. The massively successful sequel to the original Sonic the Hedgehog, Sonic 2 stands as the second best-selling Sonic game in history, and is considered by many fans as the best Sonic game.

A 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). Alternatively, the player can also play as Tails, who either functions identical to Sonic. 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. The special stage, which is now a pseudo-3D tube, involves collecting a certain amount of rings and avoiding bombs.

Returning from his previous defeat, Dr. Ivo Robotnik plans world domination once again by kidnapping and converting animals into robots, and collecting the seven Chaos Emeralds. Unlike his previous frenzy with Sonic, Robotnik has built the Death Egg, a giant battle station orbiting the Earth, and intends to conquer with it. Sonic (now followed by Miles "Tails" Prower) set off to collect the Chaos Emeralds and defeat Robonik once and for all.

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

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