If you were assigned rooms with another trainer

Considering that it's a battle competition, I'd prefer to room with either Virgil or Harrison from the anime. Both of them are champions of a Pokémon League so they would give me good advice. I could also sabotage their Pokémon before battles so I wouldn't have to battle them later on >:3

Steven Stone of course my favorite Champion ever!

Hmmm, maybe Marley (the speed stat trainer, if you don't remember). She's quiet, and from what I gathered, considerate. She seems like someone who respects privacy, yet isn't cold. Though, I'm only familiar with her through the games.

Brock. That guy knows what's up. He'll teach me his lalala song, and we'll serenade girls with it.