This is a crossover pic of Sid as a Gym Leader or Elite Four with his Ghost Pokemon. He has more Ghost Pokemon than those with him.

What's he holding is a Haunt Badge if he is a Gym Leader.

Known Data:

Cofagrigus: Ghost

Ability: Mummy

Moves: Psychic, Shadow Ball, Energy Ball, Will-o-Wisp

Jellicent: Water/Ghost

Ability: Cursed Body

Moves: Shadow Ball, Psychic, Hydro Pump, Ice Beam

Rotom: Electric/Ghost

Ability: Levitate

Moves: Thunderbolt, Shadow Ball, Ominous Wind, Electro Ball

Chandelure: Ghost/Fire

Ability: Flash Fire

Moves: Flamethrower, Psychic, Shadow Ball, Fire Blast

Cofagrigus, Jellicent, Rotom and Chandelure are (c) to Game Freak/Nintendo.

Sid is (c) to Blue Sky Studios.