Back in the day when Digimon cyber sleuth came out I wanted to make a line.

Squeakmon
Level: Rookie
Type: Rodent digimon (or rat)
Attribute: Virus
Family: Nature Spirits
Attacks: Cautionary Tail - Squeakmon uses its bulky tail to strike or bind an enemy.

Squeakmon are at home in Urban environments but retain a strange calling to the sea. They're commonly seen as thugs in an alley or simple knaves aboard a ship. Squeakmon are very fond of chewing, often biting things they shouldn't.