Okay. It has two setbacks but I think it will work.
Skarmory @ Sharp Beak - Keen eye
Drill peck (egg move)
Air cutter/aerial ace
A move of your choice (check www.serebii.net/pokedex-rs/227.shtml
to find out which moves can be learned)
Medicham @ Leftovers/Scope lens (something of your choice actually)
Fire punch (egg move)
Shadow ball (TM)
Lanturn @ Mystic water/Magnet - Volt absorb
Ice beam (TM)
1st setback: there isn't a grass move to beat swampert easily.
2nd setback: there isn't a ground move to defeat electic types easily, but Lanturn has volt absorb.