Bring back Petit devil... What's going on? I can't buy more upgrades and the game has no way of me earning medals for her. Step up your game IGG
The only way to get medals for the hero is to buy the package when it's out. After that you can't get the hero anymore. That's why it's an exclusive package.
Old k9 bBQ member :( RIP
Those heroes (Big Guy, Petite, etc.) are all exclusive and are only released during their sale period. There are currently no announcements or information on bringing them back to the market in the future yet.