Gekomon

Gekomon is a Champion Level Amphibian Digimon.

Digimon Adventure
A bunch of Gekomon and Otamamon worked in a castle where ShoganGekomon slept. DemiDevimon told them that Mimi Tachikawa had the right voice that would wake their leader. Later on, when ShoganGekomon woke up, he attacked everything before being knocked back into dreamland by Metal Greymon. The Gekomon and Otamamon appeared during the final battle against Piedmon.

Digimon 02
In the Night Forest, a bunch of Gekomon and Otamamon (possibly the same ones from Season 1) ended up as victims of the Digimon Emperor's Dark Rings and chased Mimi, Miyako Inoue, and Hawkmon until Palmon rescued them from the amphibian bunch. They were freed when the Control Spire was destroyed by Halsemon. Presumably the same Gekomon were seen in the village where the Floramon, the Mushroomon, a Ninjamon, and later ShoganGekomon were under the Digimon Emperor's control.

Digimon Tamers
A Gekomon was among the shadowed Digimon that wanted Rika Nonaka to tame either of them. One ended up in Ice Devimon's collection. A village of them were enslaved by Orochimon until some of the Tamers freed them.

Runaway Digimon Express
A Gekomon was seen when Locomon returned to the Digital World.

Digimon Frontier
A Gekomon was seen at the Fortune Teller Village. Some of them were at the Autumn Leaf Fair. One had it's Fractal Code absorbed by Ice Devimon.