Pinkie's tale is told in the game Trapped in Halloween. A portal opens and she is transported to a world where her sole purpose in life will be to collect as much candy as she can for the rest of her days.
With the help of some hidden keys, Pinkie can finally put her Halloween costume together and better fit into the strange new land she's been stuck in.
Moreover, there will be obstacles in her path, and she will be in need of guidance from an expert. The more candy you collect in each level, the more special achievements are prepared for you to unlock.
To play, just type on the keyboard.