Shellmon

Shellmon is a minor villain in the anime TV show Digimon Adventures 01. Shellmon was the second bad digimon that the DigiDestines encountered, the first one being Kuwagamon. Like Kuwagamon, Shellmon only made 2 apperences in the entire season. Another Shellmon appeared along with, Ebidramon and a Gesomon.

Apperence
Shellmon is a giant digimon with a huge shell hence the name Shellmon. Inside the shell is a pink creature with yellow hair on the top of his head. It's basically a hermit crab.

Digimon Adventure 01
After the DigiDestined's encounter with Kuwagamon, a Shellmon appeared under the sands of a beach where strange phone booths were lined up. Tai and Agumon engaged Shellmon in battle up to where Agumon Digivolved to Greymon for the first time and knocked Shellmon far into the ocean. After escaping the Dark Masters, the DigiDestined ended up in the same location and encountered the same Shellmon in the water (this time, it had dialogue). Biyomon and Tentomon were able to send it retreating.

Digimon Adventure 02
When Digimon began to appear in the Real World, he appeared once more with an Ebidramon and a Gesomon in Australia while they were chasing an Australian Digi-Destined named Derek and his Digimon Partner Crabmon. Ikkakumon, Crabmon and Armadillomon drove them away with thought of them in food. The 3 Digimon later appeared being herded with a Whamon and a Raremon after Zudomon, Submarimon and Coelamon defeated Scorpiomon and took down the Control Spire. They were all sent back to the Digital World after Scorpiomon's defeat.