Rayquaza @ Life Orb
Hasty Nature (+Spd, -Def)
~ Dragon Dance
~ Dragon Claw / Outrage
~ Earthquake
~ Overheat
Kyogre @ Leftovers
Bold Nature (+Def, -Atk)
~ Calm Mind
~ Surf
~ Ice Beam
~ Thunder
Scarfed Modest Kyogre with Water Spout > Calm Mind works too.
Groudon @ Leftovers
Adamant Nature (+Atk, -Sp. Atk)
~ Swords Dance
~ Earthquake
~ Stone Edge
~ Fire Punch
After Swords Dance, Earthquake OHKOs anything that doesn't resist it with the possible exception of extraordinarily bulky Pokemon like Suicune and Hippowdon (both of which are virtually nonexistent ingame). Fire Punch comes from either Emerald or Platinum and hits Bronzong, Tangrowth, etc.
Btw a general note about ingame is that if you have high levels and strong moves, you will win. Therefore it doesn't really matter what moves are on ubers ingame, since they are banned from the Battle Tower and thus their only use is killing random ingame Pokemon.