>3Fairy Gym Leader. Second gym in the game. First to have a full evolution. Would have a team like this, based in XY levels:
Kirlia - Lv22
Togetic - Lv23
Slurpuff - Lv26
The gym would be based in climbing a big pink tree inside trasnparent bubbles that could drop or leave your high. I would be in a big fruit in the end.
If I could choose a theme (which doesn't fit, but doesn't matter nway), would be this one:
https://www.youtube.com/watch?v=vxC-VJvBi5o 