Dark Ghost Pikachu

Extremely rare legendary form of Pikachu, in the Pokémon world, that lives in an abandoned haunted castle in the middle of nowhere. Said to combine Electric, Dark, and Ghost Pokémon powers. Till now - nobody has been able to even find, let alone catch one. But you somehow ended up in the castle and came across one. Catch him if you can. If you catch and tame him - extremely loyal, ferocious in battle, very powerful.