[Kiwami]

Quote:

Originally Posted by Dr Kain

That doesn't answer my question.

It does, because Buttobasoul is an Ex-Aid tie-in arcade game which uses the coins from the show as power-ups, you bring the physical coins with you and scan them on the cabinet.

So there's your answer, these Core Medals are different from the others because they can be used for that game.

And as usual, you would've gotten the point if you just typed "Buttobasoul" into Google search.