What scary *anime* movie did I watch on Cartoon Network?!?

Well, around 5 years ago i watched a movie one cartoon network and i cant remember the name of it and im reaaally curious to watch it again. i remember watching it as a kid it creeped me out. all i can remember is a boy and his parents went to a temple or something and thats the last u see of the parents, then i forgot the rest, but the evil guy in the movie turned his parents into pigs and the boy had to rescue them. please help me find out what movie that is!!!