After the monsters have been freed from the Underground, they've been excited to explore the surface. However, no one expects what happens.

After Starlight has been reformed, she's been hanging out with the Mane 6. But Pinkie has been shaking, her Pinkie Sense telling her that something big is going to happen. But nopony expected monsters.

Undertale/MLP crossover. Pacifist Chara. No goat child (sorry). Mettaton is in this because we need fabulous robot. Papyrus can't handle anymore puns.