Gladion's Umbreon is the evolved form of
Gladion's Eevee. It seems to stay outside of its Poké Ball a lot and walks beside
Gladion on their travels.
When Rocket Gang stole
Gladion's Lycanroc (Midnight Form), it managed to burst it's tire with its Dark Pulse to stop them from getting away.
The eighth match of the Top 16 round of the Alola League featured
Gladion's Umbreon verses
Lillie's Vulpix (Snowy). The match started with Vulpix using Hail but Gladion wanted to attack quickly so that Vuplix couldn't strengthen its defense.
Lillie figured that the only one possible way they were going to win the match is by using a Z-Move and they directly hit Umbreon Subzero Slammer but it withstood the attack and fought back with an Iron Tail and knocked out
Lillie's Vulpix (Snowy).