DIYGamer: "Welcome to the Super Meat Boy Bandage, Warp Zone and Hidden Character Guide. Below you’ll find a simple listing of which levels throughout the game contain Bandages and which ones contain Warp Zones. At the very bottom you’ll see how to unlock the Hidden Characters.
Some of the items are difficult to spot at first, but we assure you they are indeed in the levels listed. We’ve died well over 6,000 times between the contributors trying to get this information to you."