Gekomon

Gekomon is a Champion Level Amphibian Digimon. Said to be the result of data from a famous piece of music, Gekomon have an interest in anything musical. The horn around his neck and the three holes on the tip of his tongue can make music that can influence the feelings of others.

Digimon Adventure 02
A Gekomon was among the Digimon seen during the final battle against MaloMyotismon.

Digimon Tamers
A Gekomon was among the shadowed Digimon that wanted Rika to tame one of them. One ended up in IceDevimon's collection. A village of them was enslaved by Orochimon until some of the Tamers freed them. When Calumon met and was chased by a Dogmon, a Gekomon and an Otamamon watched it.

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

Digimon Frontier
A drunken Gekomon worked at the Fortune Teller Village. Some of them were at the Autumn Leaf Fair and the Great Trailmon Race. One had its Fractal Code absorbed by IceDevimon.

Digimon Data Squad
Ten years before the events of the series, Hiroshi Yushima and Kamemon fought and defeated some Gekomon in the Real World whom were riding a roller coaster.

A Gekomon was among the many Digimon seen in the Holy Capital's arena.

A Gekomon was seen in a glass stasis tube in the room where Tohma H. Norstein's sister was in.

Digimon Adventure V-Tamer 01
In one of Starmon's challenges in Star City, Zeromaru had to beat a Gekomon in a singing contest, where Zeromaru won.

Digimon World
Gekomon are wild Digimon found in Geko Swamp.

In ShogunGekomon's house there are several Gekomon. One joins the Battle Arena which Greymon sets up when defeated.

Digimon World 2
Gekomon can digivolve from Otamamon and digivolve to ShogunGekomon.

Digimon World 3
There are wild Gekomon in Asuka Bulk Swamp.

Digimon World 4
Gekomon is seen in Venom Jungle.

Digimon World DS
Gekomon digivolves from Otamamon in the level 18, and can digivolve to Whamon in the level 38. Gekomon also appears in Packet Swamp. Three Gekomon appear as ShogunGekomon's minions that the player fights.

Digimon World Dawn/Dusk
Gekomon digivolve from Otamamon and can digivolve to ShogunGekomon. They live in Loop Swamp.

Attacks 
 * Crash Symphony: Destroys the enemy from the inside out with super-high frequency vibrations
 * Noisy Echo: Launches sonic-voice with accumulated echo at opponent.
 * Tongue Attack: Whips the enemy with his tongue.
 * Symphony Crusher: Shoots a wave of sound from his horn.