Kyogre(in training)
Level 80
Moves:Ice Beam,Thunderbolt,Waterfall and Calm Mind

Swampert(in training)
Level 57
Moves:Earthquake,Surf,Muddy Water and Strength

Registeel(in training)
Level 45
Moves:Superpower,Amnesia,Metal Claw and Iron Defense

Regice(in training)
Level 40
moves:Superpower,Blizzard,Rock Smash and Ancientpower

Swellow(in training)
Level 39
moves:Secret Power,Fly,Steel Wing and Aerial Ace

Linoone(in training)
Level 35
moves:Shadow Ball,Headbutt,Dig and Cut

You only need to use Kyogre to beat the pokemon league
You'll learn the combination