people say that building a team with it is hard... is it?
Politoad
Jellicent (Spin Block and absorbs boosted water hits; handles priority of Bullet Punch, Ice Shard, Extreme Speed (Surf/Scald for Arcanine), Mach Punch, Vacuum Wave, Quick Attack, Fake-out, etc.)
Forretress (Spin/Spikes; Extreme Speed/Fake-out/Quick Attack (Dragonite/Lucario), Shadow Sneak, Ice Shard (Weavile), Sucker Punch resistant)
Riolu
Dugtrio (Tyranitar, etc. Rev. killer)
FILLER (Sweeper, Espeon, or a back-up Spiker)
-pack a spinner Forretress
-pack dugtrio (I guess it could be useful for taking Electric Attacks aimed at Poli/Jelli)
-pack ninetales or politoad
-pack someone to counter all of the priority users in the game minus scizor and conkeldurr Jellicent/Forretress
-pack rioulu
-pack someone to set hazards Foretress
-if you can fit it, pack a spin blocker Jellicent
All with room to spare, and that's if you believe Dugtrio is required, which isn't always the case.