The Missing Link (Voiced by Will Arnett) is a 20,000-year-old fish/ape hybrid who acts like a jock, but is really just out of shape in Monsters vs Aliens. He was frozen in the last Ice Age and was thawed out by scientists. He was captured in 1961 but when he escaped he went back to his old lagoon and found it being turned into a resort and he started terrorizing the tourists. He is a father figure to his monster friend Insectosaurus.
- Jeffrey will meet The Missing Link in Jeffrey & Friends' Adventures of Monsters vs. Aliens.
- Link will attend Jeffrey and Aqua's wedding in Key of Flaming Union.
- Link will guest star in Jeffrey, Jaden & Friends' Storm Adventures of Stitch!: The Movie.