looks fun at first, but this hard loses to rain and random water types with shell smash like Cloyster and Blastoise(click the sprites for the team)
Hey there here's a VoltTurn team that includes boots Victini paired with Tapu Koko for you both. This is a really fun core where Tapu Koko lures in Ground-types for Victini to snipe with Glaciate once they are weakened and remove Grass-types for it as well, where Tapu Koko is able to remove Water-types for it while also boosting the damage Bolt Strike does under Electric Terrain.
Decided Scizor went well here as it enjoys Victini and Tapu Koko removing Steel and Water-types for it letting it be an amazing wincon late game to sweep with Swords Dance. Decided to run a more offensive variant of Scizor with Metal Coat that boosts the damage of Bullet Punch doing better damage against the likes of Calm Mind Clefable and Tornadus-T. The ev spread lets it outspeed neatural speed Corviknight, while the Special Defense let's it take ice moves from Modest Kyurem after rocks and the rest evs go into Attack improving the damage it can deal.
Hydreigon made sense next acting as a Heatran check while also being able to pressure Slowking. With the first three teammates who pressure the likes against Fairy-types I went with Draco Meteor over Flash Cannon which allows Hydreigon to OHKO Urshifu-R and act as an immediate nuke against Mandibuzz.
Landorus-T acts as obligatory Electric immunity and rock setter for the team. With Toxic it allows Landorus-T put opposing Landorus-T or any non Steel-type mon wanting to take advantage of it on a time, however, you can also decide to run Protect over Toxic to get passive recovery with Lefties and be able to scout better against the likes of Choice Specs Dragapult. The ev spread lets Landorus-T outspeed Adamant max speed Bisharp and the little bit of Special Defense for better taking hits against Tapu Koko, the rest is dumped into Defense.
Lastly Corviknight rounds up the team providing a defogger and a check against offensive Grass-types and non Fire Fang Garchomp. With Rocky Helmet it allows Corviknight punish Urshifu-R whenever it uses Surging Strikes along with any U-Turn users wearing them down with chip damage for making contact. Negative speed nature here for slow U-Turns to sponge hits and be last in bringing in it's teammates safely.