This event is more challenging because Baxcalibur tends to remove your buffs, so you have to be very careful. These are the 6 Pokémon that managed to defeat him:
Start with Bulldoze to gain turn control.
Use Mud-Slap 3 times.
Use Iron Defense 2 times (just to reduce damage).
When your buffs are cleared, use Bulldoze again to regain tempo.
Use Iron Defense 2 or 3 more times.
Terastallize and use Body Press to break the first shield and continue until your buffs are removed again.
When buffs are lost, use Bulldoze again.
Use Iron Defense 2 more times.
Attack with Body Press, and if your buffs are removed again, repeat:
Iron Defense ×2
Body Press until you defeat him.
Congratulations—you’ve won! 🎉
Urshifu
Strategy:
T1: Iron Defense
T2-T4: 3x Chilling Water
T5: Terastalize, Drain Punch
T6: (After your stats reset) Iron Defense
T7: Swords Dance
T8: Drain Punch
T9-T10: 2x Swords Dance
T11-T13: 3x Drain Punch (until your stats reset)
T14: Iron Defense
T15-T16: (Wait for Baxcalibur to reset its stats) 2x Chilling Water
T17-T18: 2x Swords Dance (Drain Punch in between if you need HP)
T19-T20: 2x Drain Punch (until your stats reset)
T21: Iron Defense
T22: Swords Dance
T23+: Drain Punch