One of my (current) rules for movie fanboyism is: Jack Black can do no wrong. So, this movie, made by the Nickelodeon folks for their older viewers, is watchable and very funny in parts. Jack plays (as you may have heard) a Catholic friar in Mexico, not particularly respected by his peers, who longs for the fame and fortune of professional Mexican wrestling. He also longs for the romantic attentions of the beautiful Sister Encarnación (Her favorite animal, she says, is puppies.)
The movie's not too coherent; a lot of scenes seem to be included just for their comic content, and don't drive the plot or contribute to character development. As a result, the movie seems to go on for longer than the 90 minutes claimed on the DVD sleeve.