Tyranitar Phantom, take Mirror the Xatu.
This Xatu thinks it's from the DW and loves mirrors. You must lead with it and do one of two things.
1. If the enemy uses a move that is reflected by Magic Mirror, you must keep Xatu in and use Protect.
2. If the enemy uses an attacking move, Xatu becomes enraged and must solo all the Pokemon on the other team (barring restrictions) until it or the enemy team faints.