Quoted By:
>What would be your team's type?
Poison
>The signature/highest-leveled Pokemon on your team for which you're most known for?
Muk (lvl 50)
>The rest of the Pokemon on your team?
Nidoking (lvl 48), Crobat (lvl 48), Toxicroak (lvl 46), Scolipede (lvl 47)
>The name of the badge you hand out?
Plague Badge
>What city/town/village in any of the six regions would you host your gym in? Feel free to replace any gym leaders already existing in a town you like.
Vermillion City
>What would be the appearance of your gym's interior?
Due to a recent oil spill a la BP style in Vermillion Harbor, the water runoff is filtered into the Gym leaving the majority of it covered in sludge/grime filled water. To advance through the gym you have to ride oil barrels to get to switches to shut off the waste pipes pouring sludge that blocks your path.
Turns out the poison-type pokemon of the newly altered gym are filtering the toxins out of the water in a clean-up effort for the city.