(Variable name?) (hex:78) is a glitch Trainer class in Pokémon Red and Blue and one of the artificial Trainer classes.
Game Genie codes 78F-549-C49 and 3EF-539-B31, combined with an encounter will allow the player to face it, however the game may freeze. This freeze can be avoided with OAM DMA hijacking to lock the sound bank to a valid value (see glitch sound bank)