This article's title is a nickname based on evidence.

The Fungus Monster is an unknown monster which, from what can be seen, resembles a large, green toadstool with white spots. In Through the Looking Glass, a Fungus Monster can be briefly seen in the Monster Dimension, moving around in the vegetation.

In the Substitute befindet sich ein Pilzmonster unter den Monstern in Troop Gefangenschaft und es hat den Eindruck das der Teil mit den weisen Flecken lediglich eine Schwanzspitze oder das Ende eines Tentakels ist.

Season 2 Monsters

The Triangle: Ice GhoulBrain Gorb
The Monster Within: Seven-Winged KritlakBlood ThrasherHusking DrakVenomous TrogFestering Harpie
It's All in the Game: KaijuMind Leech
Mirrors: Reflecto LuponisSnark
Oh, Brother: Blood ThrasherDimension Mites
Through the Looking Glass: BasiliskDimension MitesFungus MonsterPurple Flying MonsterTwo-Headed ZylorkBlood ThrasherTentacle MonsterBehemothRepticoreQuadro-GobPurple Humanoid MonsterDoom HoundBorlakDragonSnark
Start Me Up: Spark Monster

This Bird You Cannot Change: OculypseKloxnixonanelsus
A Sniff Too Far: Flaying Pincher MoleSniffer
Eris Returns: RatadonSnarkEris FairieVrog
Road Trip: Fog Monster
The Prisoner of Lakewood: EvolvosaurusGleegor
Ice Hassles: Ice GhoulBlood Thrasher
Doom Hound: Doom HoundSnark