Retro Game Mechanics Explained is an educational video series from Super Mario World speedrunner Dotsarecool. In Super Mario Land 2, it’s possible to glitch yourself right out of the map and into other regions of the Game Boy’s address space. Wandering around those garbage tiles and randomly flipping bits will usually crash the game, but it’s possible to trigger the ending credits from there. This reminds me of the game-breaking screen warp glitch I played around with in The Legend of Zelda: Link’s Awakening v1.0.
Source: Retro Game Mechanics Explained via YouTube recommendation