Quoted By:
>Gym Leader Name (and Title)
Oberon (the Muscle Fairy King!)
>Gym Personality
Very into physical fitness and building strength and muscle, excitable but gallant (think Alex Louis Armstrong from FMA).
>Gym Type
Fairy
>Pokémon Used
Jigglypuff
Sylveon
Gardevoir
Gallade (I choose to ignore OP's "no straying from type" rule; if Volkner can get away with it in D/P, then so can anyone else)
>Pokémon Used (Post-E4 Rematch)
Wigglytuff
Froslass
Togekiss
Machamp
Gardevoir
Gallade
>Gym Layout/Design
It's basically a giant, pink gym (I mean like an actual muscle-building gym with training equipment and such) with a romantic design to it.
>Outfit/Costume Design
Oberon's body type is, obviously, very muscular/built. He is dressed in gym training gear: pink sweatpants and a white tank top. He wears a large pair of opaque pink Kamina shades. He has a shaved head, but maybe he has a pink ponytail in back.
>Gym Trainers
More muscle-bound, jockish types, mostly big burly men, but some female athletic trainers as well.
>Hobby Outside of Battling
Physical fitness trainer/vitamin supplement marketer/media mogul.
>Gym Gimmick/Puzzle
Muscle training! You have to be able to lift weighted puzzles and survive tests of physical endurance to reach the top!
>Choose a name for your badge
Titania Badge
>References to media
Oberon is named after the King of Fairies in Shakespeare's play, A Midsummer Night's Dream. His badge, the Titania Badge, is named after the Fairy Queen, Titania.
For more contemporary internet references, maybe some of the trainers could use /fit/ lingo ("DO YOU EVEN LIFT", OATZ AND SQUATZ", "SWOLE", etc.