Ok I already have Charizard, Sceptile, And Mewtwo.
i just need some filler for my team. ( I have Hitmonchan and Hitmonlee in mind.) Any tips? (favorite line :P)
SWampert is a great Sweeper:) With great stats, movesets and strategies, hes perfect for your team. Aggron is Pretty Good too, along with Torterra, and Empoleon, But Considering you need a water type on your team, I would pick Swampert or Empoleon.
Dragonite and maybe Salamance with high attack they are great sweepers but only pick one obviously.
Empoleon is great just for a water type. It can learn great attacks!!
Heracross are great!! They can learn a good variety of attacks also and they also have very good stats!!
Hitmonlee can absolutely wreck if you can set it up.
Hitmonlee @ Liechi Berry
EVs: 252 Atk / 252 Spe / 4 HP
-Mach Punch/Poison Jab
Endure on an attack that would take you out, grab the Liechi boost and sweep.
Metagross is a great sweeper. With a five star base attack power, and average speed, he should be considered. Also if you use magnet rise you will get rid of his worst fear, ground type moves.
Weavile super attack and super speed all the other suggestions are slow pokemon except salamence