I was unphased by Cupcakes and even Pattycakes but Pattycakes 2 made me feel really uneasy. It had the high tension feel of a psychological horror film (the creepiest kind) throughout. I mean, Scootaloo, had to face traps (non lethal) straight out of the Saw saga. I mean, Fluttershy even behaved and talked like Jigsaw; more disturbingly, she did so while maintaining her bubbly personality.
Word of advice, if you like psychological horror, it might be worth a read.