I wouldn't exactly call him a villain but more of an Anti-Hero. The reason why I would count him as a villain is because whilst Charlotte is trying to save Wilbur from being prok Templeton tries to get him into trouble. He's also reluctant to help the other animals and only helps when offered food.
Back when I had not known the rules, I had added Transfer's page. Sure the TV series is from Spain, but it happened to be Japanese-animated, so I didn't bother creating Mr. Sullivan's page. If you'd rather block me again for this, that's fine. A case like this is why I put his page in a "Candidates for Deletion" category.