
Gyarados @Lum Berry
Adamant Nature
EVs:212hp/100spe/180def/16attk
Waterfall
Dragon Dance
Taunt
Stone Edge
Gyarados with a Lum berry makes for an excellent lead. Things who try to cripple Gyarados from the start, Gyarados Taunts and gets a DD out of it. Waterfall + Stone Edge has execllent coverage, however, Emopleon could wall it, but, there aren'y many in OU, anyway.

Mesprit @Leftovers
Bold Nature
EVs:78 HP/252 SpA/180 Spe
Calm Mind
Psychic
HP Fighting
Ice Beam
Eh, just CM Mesprit, not much left to say about it.

Umbreon @Leftovers
Sassy Nature
EVs:252hp/252spdef/4def
Baton Pass
Encore
Wish
Mean Look
It traps and passes, nothing more. Encore ensures that Umbreon stays safe until it can pass- in case something tries to setup on it while it's trapping.

Charizard @Salac Berry
Adamant Nature
EVs:252attk/252spe/4hp
Belly Drum
Substitute
Fire Punch
Earthquake
Standard BellyZard, nothing more.

Jirachi @Leftovers
Impish Nature
EVs:240HP/56Atk/76 Def/136 Spe
U-Turn
Wish
Zen Headbutt
Reflect
Standard Supportive Jirachi.

Blissey @Leftovers
Bold Nature
EVs:252hp/252def/4spdef
Natural Cure
Seismic Toss/Ice Beam
Counter
Softboiled
Aromatherapy
It stops SpecsMence from BRUTALIZING my team. Ice Beam could work for better coverage and a way to kill SpecsMence easier, however, with no spattk EVs, dragons will be all it's able to hit.