The Jelly Imagin is an Imagin and antagonist in episodes 19 and 20 of Kamen Rider Den-O.
The Jelly Imagin took as his host a man named Amano, who wished to unearth the time capsule his girlfriend had buried and left behind. The Imagin completes its contract by forcing Amano to dig up any time capsule that he sees being buried. Jelly then travels to the past and attacks a bunch of picnickers near the original time capsule's burial site before being confronted by Kamen Rider Den-O. The Jelly Imagin manages to overpower Den-O Sword Form, but is destroyed by Zeronos Vega Form.