Other known variants
x2Power Saver
As long as the number of Pokémon in play (both yours and your opponent's) that has Team Aqua in its name is 3 or less, Team Aqua's Kyogre can't attack.
Aqua TripFlip a coin. If heads, the Defending Pokémon is now Confused. If tails, the Defending Pokémon is now Asleep.
Aqua SmashIf the Defending Pokémon is affected by a Special Condition, this attack does 50 damage plus 20 more damage.
This Pokémon is both Water Darkness type.
How many Team Magma/Aqua Pokemon need to be in play in order to attack with Team Magma's Groudon EX or Team Aqua's Kyogre EX with the "Power Saver" ability?
Five. If there are only four or less, it can't attack. But keep in mind that it counts Team Pokemon on both sides of the play field, including itself.