Alright, as I promised, i will be answering this team...
Changes will be in italics.
Genesect: Ahh, such a beautiful set. Nothing for me to work on here...
Blissey is nice, with the leftovers recovery and all, but Chansey can take Special attacks better...
Chansey (F) @ Eviolite
Trait: Natural Cure
Bold/Calm Nature: (+Def, -Atk) / (+SDef, -Atk)
EV's: 200 HP, 56 Def, 252 SDef
- Heal Bell
- Seismic Toss
Same set, but designed to take Special attacks with MUCH more ease, with the help of the diabolical Eviolite. If you don't want to give up lefties, your Blissey is just fine.
Ho-Oh: Try running
Jolly > Adamant for the needed extra speed... Also, you could try roost > Recover, but not necessary...
Deoxys-D: Very Nice :D
OMG, someone is using Sableye in Ubers. :D
Sadly, a nice strong attack attack rips him apart... Here in Ubers, Giratina is the King of Trolling.
Giratina @ Leftovers/Rocky Helmet
EV's: 248 HP, 8 Def, 252 SpD
~ Credit to Smogon
Pretty basic set that works exceptionally well. Troll-o-wisp is for the Obvious burn, and dragon tail is to help rack up damage with the rocks you set-up (hopefully) with Deoxys-D. Rest is reliable Recovery when used with Sleep Talk, and Sleep talk helps take away the -6 priority from Dragon Tail. Just make sure you don't get trolled by your own sleep talk and use a Troll-o-wisp on an already burn opponent.
Arceus: I'm liking that XtremeKiller set, but it could work better...
Arceus @ Lum Berry
Adamant Nature (+Atk, -SAtk)
EVs: 12 Spe/ 252 Atk/ 244HP
- Shadow Claw
- Earthquake / Recover
- Swords Dance
Ok, this is my favored XK set. Lum Berry is for that nice burn that people like to throw at Arceus, and can help you set up an extra SD. Adamant is used more more raw power for Extremespeed. 12 Speed EV's is for the tricky 8 EV's people use to outspeed the regular 4 Spe Ev Arceus. Earthquake is here to provide coverage against Steel type that wall the hell out of this guy, but recover works fine.
Good luck with the team!