Mixels are able to contract Illnesses.
Background
The first Mixel to catch an illness was Glomp. While he had his cold, he was bed-ridden and could not stop sneezing. It has not been shown what the cure is. ("Glomp's Gooey, Sneezy Cold!")
Globbie claimed he had allergies after he sneezed on Mixadel. ("Every Knight Has Its Day")
Trivia
- Lunk and Meltus have constant allergies.
- Despite his bad cold, Glomp is also always stopped up with a milder one, which is why his nose continues to run.