|This article is about a/an monster in Hikari Sentai Maskman.|
Guron Doggler (グロンドグラー Gurondogurā, 34): A 300-year-old monster used by Igam to attempt to destroy the Maskmen. This monster is disguised as a handsome man named "Hikaru". He was to befriend Momoko and convince her to quit being a Maskman, but he falls in love with her. This provokes Zeba into destroying Guron's mind, turning him into a mindless monster. He is blasted by the Jet Cannon and destroyed by Galaxy Robo.
- This monster has two connections to Choushinsei Flashman, the previous Sentai:
- Guron Doggler is the first of multiple non-human characters who uses the identity of "Hikaru".
- The "Guron" comes from "Guro", the japanese abbreviation for "grotesque"