They should allow players to sell or trade duplicate trophies

[Crazy Hand 2001]

I recently controlled two Captain Falcons just for fun in Classic Mode. I ended up getting two captain falcon trophies as opposed to one.

Why can't I sell one of the trophies?

 

[Mario & Sonic Guy]

I recently controlled two Captain Falcons just for fun in Classic Mode. I ended up getting two captain falcon trophies as opposed to one.

Why can't I sell one of the trophies?

That option was never given to us, even back in Melee. Selling trophies could've been a good way to make some money, though you'd only be allowed to sell the duplicates.