Mt. Battle isn't actually that hard; you could probably beat it with Sceptile, Swampert, Rayquaza, Groudon, and Kyogre with good sets.
You can look on the Psydex for movesets for those pokemon.
I wouldn't recommend having Elemence + Rayquaza on the same team...Alakazam would be better. Although you may not need specific Fire coverage anyway.
BTW, are you planning on doing single or double mode Mt. Battle?
Also, any ubers on your Colosseum team can't be used in Battle Frontier.
Yeah, the uber was just to help beat Mt. Battle in Pkmn Colosseum not for Battle Frontier.
Mt Battle seems straight forward but it would make it easier if i attempt to overkill it!
Also, the moveset for the uber trio have different natures and the ones i have totatlly contradict what i want from them.
Eg. Ray - jolly (needed a special fire sweeper)
Grou- Brave and Kyog- Hardy
Any moveset suggestions for them. The EV spread is the main issue.
Also, which would be better single or double. I think swampert and rayquaza should complement eachother quite well in double but not sure..
Thanks for the reply!