Jet City Gym
Jet City Gym is run by Giais. He firmly believes in a team effort. Side by side his 4 other brothers he will pick only one of them for each battle fought against a new trainer, that trainer will also be required to find a team mate to battle with and may not battle alone.
Giais himself favors Amorphous pokemon himself, although his brothers are know that change up their pokemon quite often.
Trainers are awarded the Opal Badge if they beat him.