If you dislike cheap pokemon, you will seriously despise this team and this team would be laughed out of any real tournament, but the Orre Colosseum is difficult to beat. With my "Altered" pokemon I wanted to push the limits of what I could do. I also wanted to put this game to rest that I have put several thousands of play time over the course of more than a few years. Here is the team:
Latios modest nature w/ Soul dew
Dragon Claw (Recover, Calm Mind?)
Thunder
Psychic
Ice Beam
Kyogre Impish Nature w/ Chesto Berry
Rest (Calm Mind?)
Thunder
Ice Beam
Surf (Hydro pump?)
Ho-Oh Mild Nature w/ Charcoal
Recover
Earthquake
Fire Blast (Sacred Fire?)
Thunder
Slaking Adamant Nature w/ Silk Scarf (Choice Band) (Altered)
Skill Swap (Hyper Beam)
Double Edge (Shadow Ball)
Explosion (Earthquake)
Swords Dance (Brick Break)
Ludicolo Bold nature w/ Shell Bell (Altered)
Thunder (Hydro Pump, Toxic)
Leech Seed
Substitute (Ice Beam)
Giga Drain
Regice Calm Nature w/ Leftovers (Altered)
Rest
Mind Reader (Ancient Power)
Sheer Cold (Ice Beam)
Cosmic Power (Thunder, Psych up)
I have other ones that I had considered including
Lugia - w/ scope lens (Altered)
Earthquake
Bulk Up
Aeroblast
Recover
Rayquaza Modest nature - Leftovers
(Calm Mind?)
Ice beam
Thunder
Dragon Claw
Kingdra - Modest w/ Bright Powder (Altered)
Double Team
Dragon Claw (Calm Mind?)
Ice Beam
Hydro Pump