(I have this friend who is a guru on getting hidden ability pokemon from gts, so that is where I get most hidden abilities.) Ok so I am thinking about...
For a suicide lead and spikes setter, Froslass with the Cursed Body holding a Focus Sash. Froslass is very frail, so if a super effective move hits her, focus sash helps, and combined with cursed body, could cancel the advantage if that is their only move of that type.
Destiny Bond: for when she has done enough.
Ice Beam: originally blizzard, but went for greater accuracy. Gets STAB, and works well with her good sp. Attack.
Spikes: excellent speed and choice scarf makes for at least 2 layers of spikes
Taunt: if someone wants to poison me and wait to avoid my destiny bond, this takes care of it
Jirachi with Leftovers and, obviously, Serene Grace ability. Jirachi should honestly be uber as an uncounterable pokemon. Keep ParaFlinching, and the leftovers just heal him.
Thunderbolt: hehehe, I paralyzed you.
Zen Headbutt and Iron Head: either of these, depending on type effectiveness, add a flinch to the paralyze, making it extremely difficult to move.
Cosmic Power: raise defenses while your opponent is trapped.
Mega Mawile is my choice of megas to just slaughter everything. Typing with only 2 weaknesses and Huge Power gained from mega.
Sucker Punch: makes up
for her bad speed.
Iron Head and Play Rough:
Powerful attacks, both in her typing.
Swords Dance: makes her power just ludicrous.
As a small note, jirachi, froslass, and mawile are always my main 3, as they work scarily well as a team. A disabler followed by a spiker and powerhouse can be terrifying.
The next 3 don't play off eachother as well, but are good by themselves.
Metagross is in the top of OU because of his durability and monster attack. Clear body is an extremely useful ability. Also, choice band makes Metagross a BEAST.
Meteor Mash: STAB and great power
Zen Headbutt: MORE
STAB!!!!
Hyper Beam: ok, this is honestly my ultimate aggression pokemon
Thunder Punch: killer of gyarados
Protean Greninja changes type to whatever move you use. That's 1.5x damage for everything. And, given his nearly unmatched speed, he will always dish it out first. This is a bit of a risky move, as he is a glass cannon, and he needs 1hko's or 2hko's to thrive. I equip him with a life orb, as he is made to cause heavy damage before falling in battle.
Hydro Cannon: most powerful water move
U-turn: great to take him out temporarily, but put him back eventually
Dark Pulse: just extra coverage
Hidden Power: great for ferrothorns and other grass types.
I typically put Gliscor last, because he makes a great final stand as a defensive staller. If Gliscor has poison heal, (he does), then I give him a toxic orb to hold.
Toxic: good health drain to just wait out your opponent.
Guillotine: a chance for OHKO is always a nice extra
Earthquake: because he needs SOME reliable offense.
Substitute: almost no detrimental effect with my toxic orb healing me.
This was actually my first competitive team I ever put hours into planning out, so please don't be too harsh with the comments. I'm still fairly new to this.
For a suicide lead and spikes setter, Froslass with the Cursed Body holding a Focus Sash. Froslass is very frail, so if a super effective move hits her, focus sash helps, and combined with cursed body, could cancel the advantage if that is their only move of that type.
Destiny Bond: for when she has done enough.
Ice Beam: originally blizzard, but went for greater accuracy. Gets STAB, and works well with her good sp. Attack.
Spikes: excellent speed and choice scarf makes for at least 2 layers of spikes
Taunt: if someone wants to poison me and wait to avoid my destiny bond, this takes care of it
Jirachi with Leftovers and, obviously, Serene Grace ability. Jirachi should honestly be uber as an uncounterable pokemon. Keep ParaFlinching, and the leftovers just heal him.
Thunderbolt: hehehe, I paralyzed you.
Zen Headbutt and Iron Head: either of these, depending on type effectiveness, add a flinch to the paralyze, making it extremely difficult to move.
Cosmic Power: raise defenses while your opponent is trapped.
Mega Mawile is my choice of megas to just slaughter everything. Typing with only 2 weaknesses and Huge Power gained from mega.
Sucker Punch: makes up
for her bad speed.
Iron Head and Play Rough:
Powerful attacks, both in her typing.
Swords Dance: makes her power just ludicrous.
As a small note, jirachi, froslass, and mawile are always my main 3, as they work scarily well as a team. A disabler followed by a spiker and powerhouse can be terrifying.
The next 3 don't play off eachother as well, but are good by themselves.
Metagross is in the top of OU because of his durability and monster attack. Clear body is an extremely useful ability. Also, choice band makes Metagross a BEAST.
Meteor Mash: STAB and great power
Zen Headbutt: MORE
STAB!!!!
Hyper Beam: ok, this is honestly my ultimate aggression pokemon
Thunder Punch: killer of gyarados
Protean Greninja changes type to whatever move you use. That's 1.5x damage for everything. And, given his nearly unmatched speed, he will always dish it out first. This is a bit of a risky move, as he is a glass cannon, and he needs 1hko's or 2hko's to thrive. I equip him with a life orb, as he is made to cause heavy damage before falling in battle.
Hydro Cannon: most powerful water move
U-turn: great to take him out temporarily, but put him back eventually
Dark Pulse: just extra coverage
Hidden Power: great for ferrothorns and other grass types.
I typically put Gliscor last, because he makes a great final stand as a defensive staller. If Gliscor has poison heal, (he does), then I give him a toxic orb to hold.
Toxic: good health drain to just wait out your opponent.
Guillotine: a chance for OHKO is always a nice extra
Earthquake: because he needs SOME reliable offense.
Substitute: almost no detrimental effect with my toxic orb healing me.
This was actually my first competitive team I ever put hours into planning out, so please don't be too harsh with the comments. I'm still fairly new to this.