Zurumon

Digimon V-pet Version 5 was basically the "bad boy" of the original line, consisting primarily of virus type Digimon even as far back as its baby stages, with Zurumon here being one of the meanest and rottenest of all hatchling Digimon! Its slimy form is apparently poisonous enough that even fully evolved Digimon prefer not to mess with it, just like a lot of small and frail but highly toxic critters in the real world!

Digivolves to

 * 1) Pagumon