May's Munchlax is the fifth Pokemon obtained by May.
May caught Munchlax in the episode, Berry, Berry, Interesting. He enjoys eating and is always looking for food. In Sweet Baby James, Munchlax got sick and May was extremely worried about him. A old couple [James's grandparents] cared for Munchlax. Team Rocket also stayed at the mansion and Jessie and Meowth attempted to steal Munchlax and the other Pokemon, but they were rescued by James who had switched sides for the time being and the gang. Munchlax was reunited with his trainer and was feeling better.
Munchlax has a big appetite and loves to eat food.