Thief Bug
RO ThiefBug(Larva)
Class Normal
Level 21 (RO)
10 (RO2)
Size Small
Type Insect
Element Neutral (RO)
Earth (RO2)
Natural Habitat Prontera Culverts, Prontera Fields, Geffen Fields

Thief Bug is a kind of bug that is commonly seen in a damp, dark places. It moves very fast and tends to steal items dropped on the ground.[1] The undeveloped version of the Thief Bug. Even as babies, they're pretty disgusting. Dirty, filthy creatures that tend to work in swarms. Whatever you do, don't let them pollute the Prontera Culverts; it'll be a disaster.[2]


This is a diagram of this monster's life cycle.

Thief Bug Egg
RO ThiefBug(Egg)
Thief Bug (Larva)
RO ThiefBug(Larva)

Male Thief Bug
RO ThiefBug(Male)
Female Thief Bug
RO ThiefBug(Female)

Ragnarok Online II

RO2 ThiefBug

Thief Bug as seen in RO2.

In RO2, the Thief Bug comes in several varieties:
  • Thief Bug
  • Thief Bug Larva
  • Baby Thief Bug
  • Lesser Thief Bug
  • Flying Thief Bug
  • Swamp Thief Bug
  • Mutant Swamp Thief Bug


  1. iRO Monster Library 2005 Mar.
  2. Prontera Monster Encyclopedia

External Links

Ragnarok Online

Ragnarok Online II

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.