Joel became a Plumber when he grew up. He fought in a war between the Plumbers and the Lenopans, aliens who can shape-shift. During the conflict, he met and developed a relationship with a Lenopan named Camille Mann, and they became engaged, in hopes of reaching a truce between the two sides. Camille's parents did not like this, and neither did Joel's.
In Big Fat Alien Wedding, Joel prepares for the wedding, but Camille's parents attacked the wedding along with Camille's Ex-Boyfriend. But Heatblast, Gwen's spells and Grandpa Max's weapons defeated them. Joel's parents also realized how unfairly they treated Camille. Joel and Camille were then happily married.
- Big Fat Alien Wedding (first appearance)