Board Thread:Game Discussion/@comment-12524333-20131005093751/@comment-10727129-20131005123742

if they are episode medals, pop 'em during that event to see if you can get one of the raids. If you really have nothing to do with them, you can either save them for future upgrading, or pop 'em and sell the cards for credits. Yes, you will eventually end up with thousands upon thousands, although Mobage seems to be making upgrading a bit more resource intensive these days...