Minecraft wiki entry for Easter_eggs, associated text: If one were to delete the file splashes.txt without also deleting the META-INF folder, the splash text on the title screen appears as "missingno". This is a reference to the infamous glitch Pokémon MissingNo. found in the first generation of Pokémon games. This was later changed to a zero-width no-break space, which is displayed with Minecraft's Unicode font as a box with the letters "ZWNBSP" within it.