I always enjoyed Fire Pokémon quite a bit so I guess I'd use a fire team. Also, since the last time I did some serious battling was during Diamond/Pearl there'll be no Pokemon or items attacks or items in the team introduced after that.
Arcanine - Life Orb
Thunder Fang
Extremespeed
Iron Head
Overheat
Houndoom - Power Herb
Solar Beam
Flamethrower
Dark Pulse
Overheat
Charizard - Choice Band
Earthquake
Brick Break
Aero Ace
Flare Blitz
Tornupto - Passho Berry
Overheat
Eruption
Solar Beam
Sunny Day
Camerupt - Leftovers
Earth Power
Flamethrower
Rest
Sleep Talk
Infernape - Charcoal
Flamethrower
Close Combat
Overheat
Earthquake