Uxie is a long-time veteran of Trick Room teams thanks to its capabilities as a hazard and room-setting lead that's very hard to take down in one hit, so it only makes sense it would appear on this one, now with an improved HP stat. Marowak-Alola is another obvious addition, with Trick Room's support allowing him to free up that speed slot to boost his already absurd Attack stat to new heights. Hydreigon's basically there so I don't auto-lose to Pdon outside of Trick Room, as well as being a handy switch-in to Yveltal and speedy Alolawak, which is the kind of defensive role compression this team sorely needs. Usually one would opt to run Nidoking as their Sheer Force abuser, but with its miniscule speed and titanic natural Defense, Steelix was the far better choice for this team, with its dual STAB being able to deal huge damage to many threats with DW Necrozma's 157 Special Attack while sniping Lunala, weakened Lugias or even the occasional Lati twins with Dark Pulse. Stakataka is another natural-born Trick Room staple, and aside from improved Special Defense it does much the same things it has always done, aiming to clean teams with its deadly Gyro Ball. In the final slot is the Uber of choice for the team, Necrozma-Dawn-Wings. Compared to Lunala it has higher Special Attack, Defense and Special Defense and lower Speed, making it a better fit for this team, and unlike Dusk Mane, it has a better match-up against Ferrothorn as well as granting Steelix the behemoth Special Attack it needs to succeed