Anti-Oswaldo is Oswaldo Cosma's evil counterpart. He is the cousin of Anti-Cosmo and the son of Anti-Jeff Anti-Cosma.
Like every other anti-fairy, Anti-Oswaldo's personality is a combination between Anti-Cosmo and Foop, he wants to have a evil godchild like Anti-Cosmo and destroy the world like Foop.
* Oswaldo is nice, while Anti-Oswaldo is evil.
- Oswaldo speak like a normal person, while Anti-Oswaldo speak with a british accent.
- Oswaldo has a good sense of humor, while Anti-Oswaldo has a bad sense of humor.