Arena battle wearing a helmet

[Immaculate]

assume CBM:

What happens if you go to the arena wearing a helmet and you win? Does the champion's helmet or whatever its called replace your current helmet? What happens if someone who can't wear a helmet wins in the arena?

[Calahan]

If you have no valid slot for the Arena prize then you do not get anything other than the exp. (so no head slot means you do not get the Helm in CBM.1.92+)

If you already have an item in the slot required, then that item is magically transported to your lab (not tested what happens if there is no space in your lab), and the Arena prize replaces it. (this is the same mechanic as Wishing for items)

[brxbrx]

Threads should specify if they're about CBM or not, to avoid confusion.