Circle Circle Square...
It seems to do it often for me in battle.

Story mode: don't attack it just yet, go train yourself in the quick battle mode. Usually, when you hit about 15-18 levels, you can clear the stage of the character in story mode easily.

Buy equipment! Make it the top for your character.
Play when it is your special day!!! Lot's of bonuses are going on!!!
Buy the calendar event!!! They are worth it!!! (PP shop)