Kyogre's best moveset in Pokémon GO is Waterfall and Origin Pulse, with 17.55 damage per second, and it can deal 651.1 damage before Kyogre faints. This is true when battling in neutral weather. You need an Elite Charge TM to get Origin Pulse.
All Kyogre movesets ranked
Here is a complete list of Kyogre movesets in Pokémon GO, ranked by their DPS and TDO. You can change the weather and the opposing Pokémon.
|1.||Waterfall||Origin Pulse *||17.55||651.1||43.3|