Got a six. 
Name: Mindfuck
Pokemon: Aggron, Aggron, Alakazam - just to fuck with whoever thought to bring a fighting pokemon - and then Aggron, Aggron and Aggron.
Why? Because:
Badge: Badgegron
TM: Metal Dinosaur: Makes pokemon 4x resistant to water, fighting and normal type attacks.
Catchphrase: Ha, good luck.
Gym layout - because I'm awesome like that: Walk up a spiral staircase up the inside of a mountain, fighting grass, flying, psychic and ghost pokemon. Serves you right for trying to bring pokemon that you think might actually beat Aggron.
Name: Mindfuck
Pokemon: Aggron, Aggron, Alakazam - just to fuck with whoever thought to bring a fighting pokemon - and then Aggron, Aggron and Aggron.
Why? Because:

TM: Metal Dinosaur: Makes pokemon 4x resistant to water, fighting and normal type attacks.
Catchphrase: Ha, good luck.
Gym layout - because I'm awesome like that: Walk up a spiral staircase up the inside of a mountain, fighting grass, flying, psychic and ghost pokemon. Serves you right for trying to bring pokemon that you think might actually beat Aggron.