TOGEKISS WITH BATON PASS AND SUBSTITUTE. Take Togekiss and wall the person with Substitute.
TOGEKISS[u]
Moveset: Substitute, Thunder Wave, Sweet Kiss, Baton Pass
Ability:Serene Grace
Nature: Impish, Relaxed*, Lax, Bold
This is nothing but a support set. You can run it as a lead, or as a revenge killer, but it would do better as a lead, since you're just walling and crippling your opponent. Feel free to use the moves up above in that order and switch in to one of the following pokemon. If you don't have a Togekiss with any of the above natures, try and breed it. Try not to use a Relaxed nature because it lowers speed like heck.
[u]GARCHOMP
Moveset: Swords Dance, Outrage/Dragon Rush, Earthquake, Fire Blast/ Fire Fang/ Sandstorm
Ability: Sand Veil
Nature: Jolly
Garchomp is perfect for being Baton Passed from Togekiss. Just watch out for the Ice Beam, and you should be fine. If you are unable to get the move Outrage, use Dragon Rush (or breed with a Dragonite). Fire Blast has a powerful attack, but it's got less accuracy if you're not running Sandstorm. Fire Fang for Swords Danced Garchomp for doubled attack. Pick whichever one you want, but I would go with Fire Blast. Sandstorm for weather effects and Sand Veil's evasion raise.
HIMONLEE
Moveset: Hi Jump Kick, Sucker Punch, Stone Edge, Double Edge
Ability: Reckless
Nature: Adamant or Jolly
Okay, pretty simple moveset here, Reckless Hi Jump Kick smashes everything, just watch out for that 50% recoil if it misses (it would be a good idea to have an item that boosts accuracy). Sucker Punch for Psychic and Ghost types, Stone Edge for Flying types. Double-Edge is just a move that I filled in, but you could use Earthquake both for those pesky Poison types.
METAGROSS
Moveset: Psychic, Meteor Mash, Rock Slide, Signal Beam
Ability: Clear Body
Nature: Quiet
Another good moveset. Psychic and Meteor Mash are your STAB moves, Rock Slide for those Fire Types, Signal Beam for them Darks and Psychics. You want a Quiet nature, mainly because you are focusing on Special Attack, and Speed mainly won't do good.
WHIMSICOTT
Moveset:Substitute, Leech Seed, Taunt, Encore/ U-Turn
Ability: Prankster
Nature: Bold, Impish
Okay, I know that you don't have a Whimsicott, but you can obtain a Cottonee in Nacrene City. There is a lady in one of the storehouses and she wants a Petlil. Breed the Cottonee to your favoring.
Anyways, Whimsicot is pretty awesome! Prankster allows you to have +1 priority on each of non-attacking moves. That means all of those moves except for U-Turn have +1 priority. Simple moveset, almost like Togekiss. Place a doll in their face with Substitute. Give'em a Leech Seed, Taunt do that they can't hurt you, and Encore for the multiple uses of the same move, that'll annoy them to death. Use U-turn to scout.
RHYPERIOR
Moveset: Earthquake, Rockwrecker, Megahorn, Thunder
Ability: Solid Rock
Nature: Brave
This is one of the worst typings you can ever get. Rock and Ground. Weaknesses are Grass, Water, Fighting, Ice, Steel, and Ground. Thunder for the Waters, Megahorn for them Grasses, Rockwrecker and Earthquake are STAB moves. If you come across a Steel or Ice, switch to Hitmonlee, if you have a Ground type, go to Whimsicott.
I hope this helped