8th Gym>Fighting>BicepBadge
My Gym would have a boxing ring, where three trainers come out, when you defeat all three, the gym leader (me) steps out to challenge you.
Team
Poliwrath: IcePunch, Waterfall, Substitute, FocusPunch
Hitmonchan: FirePunch, ThunderPunch, IcePunch, BulletPunch
Infernape: StoneEdge, Earthquake, FlareBlitz, CloseCombat
Toxicroak: SludgeBomb, GunkShot, CrossChop, SuckerPunch
Breloom: Seed Bomb, DynamicPunch, Sky Uppercut, MindReader
I would hand out the TM for BrickBreak (ironically, none of these Pokes know the move)