That question is too cute! What if something like this happens:
bonnie thinks iris is super-cool, so she proposes to her for clemont, but iris declines. Bonnie's a little upset, but quickly comes to the conclusion that the reason iris said no was because she's already engaged...perhaps to the 'new guy' she came with, cilan? then blushing occurs and iris says no, they are not engaged, while cilan just kind of stands to the side and doesn't say anything, maybe laughing to himself and blushing.
stunfisk then comes out psyduck-style and gives a creepy grin (like this)... bonnie thinks he's the cutest thing ever and hugs him etc etc...cilan doesn't want to return him since bonnie's having fun, so stunfisk just continues to stare at his trainer with that creepy face, making cilan even more flustered (i dunno, i just REALLY LOVE STUNFISK ok)
that......doesn't make any sense, does it? it sounded a lot better in my head than writing it down lol