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I think you mean Smash =P
Would seem like such a useless thing though... I mean, I don't know about other people, but money in Pokemon is rarely ever a problem. And by rarely, I mean, once in a blue moon. I would hope there'd be more rewards than just getting your money back.Here's a new rumor! Maybe one of the cities in the Kalos region will have a bank, so that you can safely keep a certain amount of money in one of them just like you would with Pokemon at the Day Care. Once the money is deposited you can have it back whenever you like, although it might come without an interest rate. :P
This idea might be abused however, for example if you deposit all your money and then lose a Pokemon battle then you will lose0, which means that you don't actually lose any money at all, because it's all in the bank.