FusionDex

Geneon come out at night, blending into the darkness save for the face-like patterns upon their bellies. If one sees a glowing face seemingly suspended mid-air, they should flee, or else a Geneon's tongue will catch them and drain their energy.

A Pokémon that has the ability to alter its body colors to match its surroundings. Deep in the night, your shadow cast by a streetlight may suddenly overtake you.