List of Super Mario World 2: Yoshi's Island glitches

These are glitches found in Super Mario World 2: Yoshi's Island.

NOTE: Yoshi must have the 10 Stars or 20 Stars item to activate this glitch.

In World 1-2: Watch Out Below!, the player should go to the area with the Helicopter Morph Bubble. The player should then get the bubble and fly into a Goonie. He/she should then wait until the counter reaches zero. While the Toadies are taking Baby Mario away, the player should quickly hit him with Yoshi's tongue. The player should touch the Helicopter Morph Bubble. Once Yoshi has already transformed, the Toadies will try to take Baby Mario again. When they pop Baby Mario's bubble, the player must open their inventory and select the 10 Stars or 20 stars item. When the Toadies are gone, the player must wait until Yoshi transforms back to normal. The player is able to eat Mario if Yoshi licks him. Even though Baby Mario still missing, the game won't freeze, but the level is rendered impossible to complete.

Note: This glitch occurs on the console and not the game, and is not present on all SNES consoles.

This glitch occurs during specific areas where the graphics are rendered incorrectly. It seems to occur where translucent and transparent objects are present. The screen will become filled with various twitching objects, and Yoshi as well as all other enemies and objects will disappear. Since the player cannot see anything but the terrain, this glitch makes the game nigh unplayable. The screen will momentarily return to normal when the game is paused, although it will only be visible for a fraction of a second. This glitch appears to be a flaw in the SNES's rendering capabilities as opposed to the game's, as it only occurs on specific consoles and not specific cartridges.

In world 2-7 Lakitu's Wall, Yoshi can eat a Fat Guy for a Giant Egg. When Yoshi arrives to the part with a Car Morph Bubble, he should hit the Hint Block with the Giant Egg to make every thing freeze for a little while. When that is over the stars from above will fall to the ground and Yoshi will be invisible. Yoshi can still walk around while unseen but it will be difficult. If Yoshi jumps through the finish ring while invisible, the whole game freezes and the player will have to reset their Super Nintendo Entertainment System.

In places like World 3-1, there may be situations where it looks like Yoshi has something in his mouth, but he really doesn't. First, ingest a Grinder and keep it in Yoshi's mouth until you reach the checkpoint. Then, as soon as the player touches the ring, spit the Grinder out (hold up while spitting it out). The Grinder that's spat out will turn into a star, but before it even does that, the player can see that the spat out Grinder is invisible. When the checkpoint sequence ends, the star from the Grinder can be collected, but Yoshi also has an invisible object in his mouth. He can still stick his tongue out, but he can't eat enemies. But when the player press down with the invisible object still in Yoshi's mouth, he will also produce an invisible egg.

This glitch must be done in Bowser's Castle, in the Door 1. The Player must go to an area where a ! Switch near a long lava pit can be found. The player would normally have to hit the switch in order to get across the lava, activating the Dotted Line Blocks. If the player jumps in the lava, in the direction of the switch, Yoshi will perform a last jump, since he burned himself. If done right, Yoshi will hit the switch, and come back to life. The music stops, and the player controls Yoshi normally, even though he was supposed to lose a life. If the player attempts this glitch while Yoshi only has 1 life left, he will have 0 lives, as shown in the pause screen. However, if the player repeats this process, Yoshi will instantly get 999 lives.

It's extremly hard to do, but when fighting the final boss, if Bowser gets close enough and breaks the roof, he will flip and head in reverse, and will duplicate a lot of times and will come back later.