Wooji

Wooji is a demonic clone of luigi, it was around since luigi was born Its gender is unknown as its appearance is a demonic luigi. It can summon things, use tentacles, cause illusions, hallucinations, flashbacks, and seizures. It can even shapeshift. It can do many things. It even pulled mario using a octopus like tentacle up a chimney and ripped him apart limb by limb with his bare hands. It was killed by luigi by him killing himself, making the demon disintegrate.