Here's mine in case you're interested.
Decidueye
the CunningIt had Spirit Shackle, Roost, Leaf Blade and Brave Bird but it mostly just fired off it's Z-Move and then got killed. Sad!
Persian
The TriumphantPersian was surprisingly useful to me throughout the playthrough. It's high speed and amazing coverage with moves like Power Gem, Faint Attack, and a Ground type Hidden Power kept it in the mix and it's generally really good at finishing off a weakened foe. The second pokemon I caught.
Hariyama
The Immobile: There's a move called "Close Combat", you use it and everything dies. it's amazing. It also has Brick Break, Knock Off, and Rock Slide. It was the third pokemon I caught.
Garchomp
the UnstoppableGarchomp was one of two of my last minute additions picked up towards the end the third island during my playthrough. It's fairly quick and hits like a truck with moves like Dragon Claw, Crunch, Rockslide and Bulldoze
Crobat
The ForgettableCrobat was the second of my last minute additions and while it nabbed me a few key fights outside of the Elite Four it's contributions to the Elite Four were somewhat diminished. It basically either won me a battle single-handedly with moves like Air Slash, Leech Life, and Cross Poison, or it just got itself killed. The fifth Pokémon I caught.
And finally my most valuable member of my team.
Wishiwashi
The Destroyer of Worlds.
Wishiwashi was easily my most powerful team member. It can nuke stuff with Scald, use Ice Beam or Bulldoze for coverage and... look, having Aqua Ring on it looked good on paper alright?
But Wishiwashi is probably one of the most overpowered pokemon I've ever ever used to be honest with you. I love it.