 Use this Slowbro for the most consistent way to always beat the 7-star Greninja Terror Raid event. Level Slowbro to 100, give it a modest nature, make sure it's IVs in HP, Defense, Special Attack, Special Defense and Speed are all set to 31. Give it an EV spread of 252 HP, 4 Defense and 252 Special Attack, with a move set of Slakoff, Iron Defense, Nasty Plot and Stored Power. And make sure it's got a Psychic Terror Type, and give it the leftovers as a Telled Item. Once you've located the 7-star Terror Raid event, go in and do exactly this. Turn 1, Iron Defense, Turn 2, Stored Power, Turn 3, Slakoff, Turn 4, 5 and 6, Iron Defense until a plus 6. Use Slakoff or the Heal Chair when needed. Turn 7, 8 and 9, use Nasty Plot until plus 6, Special Attack. Again, use Slakoff or Heal Chair when needed. Turn 10, use Stored Power, turn 11, use Stored Power, and then turn 12, Terasalize and finish Greninja off with your last Stored Power.