Giratina

Giratina is a Legendary Pokemon that often appeared in cemeteries and lived in the reverse side of the Pokemon World. It was said to be banished for its violent actions, which was shown in the anime, when it attacks Dialga as its revenge for damaging its home while fighting against Palkia. It was shown to transform into its Origins Form whenever it was in its home (Reverse World), or holding a Griseous Orb.