can be encountered via Method #3 of the Mew glitch, with a special stat of 195. is a relatively safe glitch Pokémon to use, as it is a hybrid of Gengar, but it can be difficult to catch and train because normally when is caught, its Pokédex data (which consists of chaotic glitch songs and visual glitches) will lock up the game. The frozen Pokédex data can be avoided if the Trainer catching has a Gengar registered in their Pokédex as "owned". A Red/Blue player can also have a ゥ ( Z4 ('s Yellow version equivalent) traded from Yellow.
's cry is long, glitched, and different every time its stats are checked, depending on the last cry heard. On rare occasions, 's cry may freeze the game.
has only two moves it can learn while leveling up (under level 100).
can learn all Generation I Ghost-type moves.
's cry changes depending on the last Pokémon's cry played. Because this includes its own cry, viewing its stats multiple times in succession can cause long glitchy strings of sound, sometimes minutes long. Sometimes its cry never even ends, effectively locking up the game.
At 6,099 lbs (2766.5 kg), can be considered as the heaviest Pokémon which can be obtained without the use of a cheating device.