Mario & Sonic Guy
Old rivalries live on!
Interesting. I thought that you can't have any trophy duplicates present if the trophy count reads x1; it was like that with Brawl's trophy hoard room.But when you unlock even ONE copy of a trophy, you can use as many of it as you like in the Photo Studio.
So if I cleared Classic Mode once with Mario, and took the trophy I earned to the Photo Studio, I could still place 4 copies of it.