I always love when I find really graphic are creepy pokedex entries.
Have you ever caught a pokemon only to be amazed at what the pokedex had to say about it?

Spoink- Spoink bounces around on its tail. The shock of its bouncing makes its heart pump. As a result, this Pokémon cannot afford to stop bouncing - if it stops, its heart will stop.

Cubone-It pines for the mother it will never see again. Seeing a likeness of its mother in the full moon, it cries. The stains on the skull it wears are from its tears. It wears its mother's skull, never revealing its true face.

Shedinja-Shedinja's hard body doesn't move - not even a twitch. In fact, its body appears to be merely a hollow shell. It is believed that this Pokémon will steal the spirit of anyone peering into its hollow body from its back.

Gengar- Sometimes, on a dark night, your shadow thrown by a streetlight will suddenly and startlingly overtake you. It is actually a Gengar running past you, pretending to be your shadow. To steal the life of its target, it slips into the prey's shadow and silently waits for an opportunity. On the night of the full moon, if shadows move on their own and laugh, it must be Gengar's doing.

Hypno- It carries a pendulum-like device. There once was an incident in which it took away a child it hypnotized.