[How about Jean just doesn't doubt him in general.]

Would you? Then, please. You are much better at it than I am.

[Armin's art skills haven't improved much over the nearly a year he has been here. Maybe he should get a pokemon capable of drawing like Jean has.

Not that he probably wants to see Polo's version of Suicune.]

I'm not sure if we can say it stole it though. He don't exactly know its motives. Does a legendary pokemon even understand the concept of ownership?