|Voiced by Juan Chioran|
|Real Name||Lance Boyle|
|Social Status||Wanted criminal, former Grossologist|
|Signature Ability||Science, big boil on his head|
Lance Boil was once a successful Grossologist, but grew tired of the grind. He quit the Grossology team for never receiving much credit. He also caused the Gag Lab to fill with pus, revealing his plan to take over the Bureau of Grossology. It is also shown that Ty played around with Lance's Shrink Ray, removing a part and causing Lance to blast himself and shrink. At first, Lance didn't like how he looked, but later on, he is shown to be very proud of his boil. After being fired from the team, he decided to use his skills to evil, with one goal in his twisted head revenge against all Grossologists; especially Abby and Ty. Deep down Lance Boil is insecure due to being short, having a big head, and having a boil on his head.
- First Appearance: Episode 6 ("When Ya Gotta Go")