Poyomon

Poyomon is a Slime Digimon whose name is derived from the onomatopoeia for toddling (ぽよぽよ), and as such it is a baby. With a translucent body, it is a Digimon Baby that drifts through the "Net Ocean" like a jellyfish. As it has the most primitive structure among the Digimon discovered to date, it has been showered in attention as the "Missing Link", the key to solving the mystery of the origin of Digimon, by the scholars and enthusiasts studying the roots of Digimon. In order to defend itself from invaders it spit powerfully acidic bubbles from its mouth.

Digimon Adventure
Several Poyomon are seen in Primary Village.

Digimon Adventure 02
A Poyomon is the only Digimon kind to Ken when he comes looking for Wormmon at Primary Village.

Poyomon are seen with Elecmon and other Fresh Digimon in a forest as BlackWarGreymon passes by.

A Poyomon becomes a partner to Takashi.

Digimon Frontier
Poyomon are seen floating in the sky at the Flame Terminal, the Great Trailmon Race, and the Village of Beginnings. There were also some born on Ophanimoon. (Picked up by Kouichi.)

Digimon Frontier: Island of Lost Digimon
Several Poyomon are among the Fresh Digimon on the Human side.

Digimon Data Squad
A Poyomon was among the Digimon caught in the vortex that appeared when humans were deleting Digimon.

Digimon World DS
Poyomon is treated as an In-Training, and can digivolve to Gomamon, Crabmon or Kamemon. They are also enemies in Data Forest.

Digimon World Dusk and Dawn
Poyomon can be found in the Loop Swamp and are treated as In-Training Digimon. It can digivolve to Crabmon, Gomamon, or Kamemon. To degenerate into Poyomon, the digimon must be at LV 3 or higher.

Digimon Story: Lost Evolution
Poyomon can digivolve into Syakomon, Gomamon or Kamemon, and be found in the North Marine.

Digimon World Championship
Poyomon digivolves to Tokomon(20 Holy AP), Bukamon (20 Aquan AP), Nyaromon (20 Beast AP) or Motimon pass time.

Attacks
 * Kyouryoku San no Awa (強力な酸の泡): Spits powerfully acidic bubbles from its mouth to defend itself from invaders.