List of Super Mario Advance glitches
This is a list of glitches found exclusively in the game Super Mario Advance, a remake of Super Mario Bros. 2. For glitches found in the original game and possibly Super Mario Advance as well, see List of Super Mario Bros. 2 glitches.
This glitch requires Mario or Luigi. In 2-1, a wall while digging through the sand exists. The player should super jump with the key up to it, and once they touch the wall, try to throw the key. If done right, they'll be stuck in the wall. The Phanto will be delayed for about two minutes, but will eventually swoop in. The only controls are left and right, though they make the character walk nowhere.
First, the player must go to level 2-2 and play as Luigi. The player must have at least three hearts, and go into the tall vase shortly after finding the Mushroom. Once inside, the player has to pick up the strange ball, and then super jump, hit a Spark (at the top) and try to get to one side or the other (this part is easier the more hearts the player has in possession). The player can't do it with only two, as when they shrink it won't launch them. Then, the player must carry it out of the vase. It will become a Yoshi Egg with the palette of the ball. It will act the same way as the ball, with the exception of being re-usable if it falls in quicksand.
Stuck in a Mushroom Block 1
This glitch best works in the Fryguy's boss fight area. If the player slides underneath one of the flying Mushroom Blocks, the player will have to let go of down on the controller. The character's whole body, except for legs, will be trapped inside the Mushroom Block. The only way to get out of it is to slide back out.