Otamamon

Otamamon is an Amphibian Digimon. A larva Digimon whose skin has not yet fully hardened because it chose to live underwater. It swims in lakes and rivers upstream of the Net Ocean with its large tail, and occasionally climbs up onto rocks with its developed forelimbs and does. Its mostly undeveloped hind limbs act as rudders in place of its tail, which has gained propulsive power, contrary to typical organisms. It is valuable among Rookie levels in that it signals its upcoming evolution clearly, but since its potential for mutation is extremely high, caution is necessary in its training.

Attacks Attacks in Digimon World: Dawn/Dusk
 * Lullaby Bubble: He sings a mysterious melody that puts his enemies to sleep.
 * Kid Claw (Child Claw):Scratches at the foe with small claws.
 * Wrapping Bubble: Causes a ball of water to drop on the enemy from the sky.
 * Slamming Attack (たいあたり): Tackles the enemy.
 * Water Shot
 * Tsume Kougeki
 * Tsuyoi San no Awa
 * Iyashi no Mizu

Design
Otamamon is a purple pollywog with developed forelimbs and undeveloped hind limbs. It has a wide mouth with several pointed teeth, round eyes, and its tail end in a web of skin supported by bony.

Etymologies
Official name given by the Digimon Reference Book and used in the franchise.
 * Otamamon (オタマモン)
 * (Ja:) Otamajakushi (オタマジャクシ).

Digimon Adventure: Anode/Cathode Tamer
Otamamon are recruitable enemies in Continent's Fortress, Etemon's Palace, Temple of Darkness—Right, Shrine of Evil—Right, and Millenniummon's Lair. Otamamon are Virus Digimon who fight on the water.

Digimon Adventure 02
A group of Otamamon helped the DigiDestined rebuild the Digital World.

Digimon Adventure 02: Tag Tamers
An Otamamon, along with a Gekomon, run an item shop on the Machine continent.

Otamamon are normal enemies in Ryo's side of Death Crevasse 2 and Ken's side of Death Crevasse.

Otamamon digivolves from Bukamon to Gekomon with a digi-egg and Octomon without in line 55.

Digimon Tamers
An Otamamon was seen with a Gekomon when Dogmon chased Calumon. A bunch of them were in an underwater cave plain of the Digital World and they were protected by a Divermon.

Digimon Tamers: Runaway Locomon
An Otamamon was seen when Locomon returned to the Digital World.

Digimon Tamers: Brave Tamer
Otamamon are enemies in the Crevasse of Two Nails.

The Otamamon card, titled "PF Poison Card", is a Rank 2 card which increases resistance to the Poison status ailment.

Digimon Frontier
Some Otamamon are at the village near KaratsukiNumemon Mountain and the Autumn Leaf Fair. One of them at the Autumn Leaf Fair is unable to help find the  who stole the boys' D-Tectors.

Digimon Data Squad
10 Years Ago as told by Merukimon to the captive DATS members, two Otamamon were among the Digimon running from the humans who were deleting Digimon (revealed to have been led by Akihiro Kurata). One was Keenan Crier's childhood friend.

Some injured Otamamon were seen in the care of Cherrymon and the Nyokimon that he protects. An Otamamon was seen in a stasis glass tube in the room where Thomas H. Norstein's sister was in. Later on, Biyomon returns to the Damon household with numerous Fresh and In-Training Digimon. Otamamon was also one of them, as was classified as an In-Training Level Digimon.

Digimon World
An Otamamon in Geko Swamp tries to insult Hiro, and wants to battle, after the battle the player can go to Volume Villa. At Volume Villa you see a few Gekomon and a ShogunGekomon who gives you merit points if you trade him certain cards. These merit points can be used if talk to ShogunGekomon and go to 'USE MERIT POINTS', you can use them to get:

Digimon World 2
Otamamon can digivolve to Gekomon or Octomon.

Digimon World 3
Otamamon is only available as a Blue Rookie Card with 1/1.

Digimon World 4
Otamamon is seen in Venom Jungle.

Digimon Digital Card Battle
The Otamamon card is #066 and is a Rookie level Ice-type card with 710 HP, and worth 20 DP in the DP Slot. Its attacks are: Its support effect is "Reduce opponent's Attack Power to 0."
 * "Stun Bubble": inflicts 330 damage.
 * "Kid Claw": inflicts 130 damage.
 * "Wrapping Bubble": inflicts 100 damage, and sets the opponent's attack to 0.

Digimon World DS
Otamamon can digivolve into Gekomon or Raremon. Otamamon is also found in the Drain Tunnel.

Digimon World Dawn and Dusk
Otamamon is #036 in Digimon World Dawn and Dusk, and is a Balance-class Aquan species Digimon with a resistance to the Water element and a weakness to the Machine element. Its basic stats are 105 HP, 109 MP, 75 Attack, 63 Defense, 57 Spirit, 53 Speed, and 20 Aptitude. It possesses the Mist Cape 2 and Sleep Ward 1 traits.

It dwells in the Loop Swamp.

Otamamon can digivolve to Gekomon, Numemon, or Geremon.

Otamamon can DNA Digivolve to Gwappamon with ToyAgumon, or to Tortomon with Gotsumon or Armadillomon.

Otamamon can be hatched from the Blue Digi-Egg.

Digimon World Championship
Otamamon digivolves from Babydmon with 3 Penalties and can digivolve into Gesomon with 3 Battles, Gekomon with 20 Aquan AP or Raremon pass time.

Digimon Story: Cyber Sleuth
Otamamon is a Water Virus Type, Rookie level Digimon and uses 4 memory. It digivolves from Bukamon and can digivolve to KaratsukiNumemon, Gekomon, Seadramon and Numemon. It's special attack is Lullaby Bubble and its support skill is Deep Sea Slumber which causes all attacks to have a 10% chance to cause sleep.

Digimon Story: Cyber Sleuth - Hacker's Memory
Otamamon is #24 and is a Water Virus Type, Rookie level Digimon and uses 4 memory. It digivolves from Bukamon and can digivolve to KaratsukiNumemon, Gekomon, Seadramon, Numemon, Coelamon and Raremon. It's special attack is Lullaby Bubble and its support skill is Deep Sea Slumber which causes all attacks to have a 10% chance to cause sleep.