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.

Sonic the Hedgehog 2 XL is a joke hack which adds a new gameplay gimmick. The standard rings the player normally collect have been replaced by onion rings. The more onion rings the player collects the fatter he gets. As he gets fatter he gets slower, jumps shorter, and becomes unable to roll. If the player eats too many onion rings the player will die. The player can burn off the fat by running or by breaking the ? monitors found throughout the levels.

==Facts about the hack==
[list]
[li]It takes about 5 rings to to go up a level in fatness.[/li]
[li]Spin dashing and normal spinning is lost at fat level 5.[/li]
[li]It takes about 30 rings to die of fatness.[/li]
[li]The fatter the player gets the less the player is able to look up and down, and gives up at level 6.[/li]
[li]If using debug mode to finish Death Egg Zone as while fat the player goes down to fat level 3.[/li]
[li]If breaking a "?" box, Sonic will lose weight instantly.[/li]
[/list]

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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