Char Sui is a villain of the Buddhist Monkey series (a spin-off of Happy Tree Friends).
Char Sui is a small pink pig who first appears in the episode "Three Courses of Death", where he is sent by The Dark Shadow Lord to kill Buddhist Monkey after the Generic Tree Ninjas have failed. Despite his size, Char Sui stood a fair fight against Buddhist Monkey, as he sported a basket-like hat on his head which contained a giant crab. Buddhist Monkey managed to defeat Char Sui and the giant crab by boiling them to death.
According to the creators of the show, it is possible that Char Sui may return in future episodes.