My Little Pony: Friendship Is Magic: Season 2, Episode 10

2 - 10: Secret of My Excess

It's Spike's birthday, and he receives a lot of presents from all his friends. But his appreciation soon turns to greed, which escalates to an obsession to hoard everything available. Everything. Now his friends will have to save him from this downward spiral to prevent him from becoming a full fledged monster.