Make Tonics Sellable on TP.
If they did this, prices of most tonics would be ridiculously low on the TP. Everyone has so many just lying around in their bank or inventory except for those who consume them for no reason. Most people would want to get rid of them. If the only reason for owning tonics is for costume brawl, and you already own an endless tonic or a costume with a toy, then why would you ever use the regular tonics for costume brawl? I agree that it would be nice to be able to sell them but then they would have to introduce something similar to the Party Animal title in the first game, so people would actually buy them to consume them, thus increasing the demand and price of them.