
Its name is taken from the unused Japanese list strings. In the English versions, this string was untranslated resulting in mojibake "w 'l#m#".
Using this glitch item causes arbitrary code execution at region D983 in WRAM; which is the number of stored Safari Balls followed by the Day Care structure.
Here a Day Care Pokémon name such as "ガガてルめ" can be used to redirect the game to item slot 3 in the player's inventory or alternatively fall through to a bootstrap code in stored Pokémon data.