|Normal Version||Boon Doc|
|Owner(s)|| Dr. Blakk's Arsenal (Formerly)|
Junjie (Former Host)
Eli Shane (Former Host)
Will Shane(Former Host)
|First Appearance||"The Unbeatable Master"|
A Goon Doc is the Ghouled version of the Boon Doc. A Goon Doc is the exact opposite of a Boon Doc, since the Boon Doc heals and the Goon Doc kills and ghouls. The Goon Doc made its debut in the episode "The Unbeatable Master" to kill Shanai. A Mega Morphed Goon Doc, who is referred to as "The Goon", appears on the poster for the Slugterra movie Ghoul From Beyond and it turned out to be the main villain in the movie and made a return in Return of the Elementals.
- Protoform Abilities
- Makes people feel ill when standing nearby.
- for more see "The Goon"
- Medusi - Poison attack that will slow an opponent down for a short period of time.
- Creepsleep - Poison paralysis drops opponent into a temporary coma.
- Turncloak - Emits a ball of dark light that creates a zombie-like feral state. Slingers will start attacking allies.
- Ghoulgoyle - Hits an opposing slug and uses dark energy to transform them into a ghoul.
- Leachfang - Kills the oppenent by using this. (Dr. Blakk's Goon Doc probably used this to kill Shanai)
- Darkgoyle (unofficial name) - see "The Goon"
- A total of 2 Goon Docs have been seen in the series; One being a Blakk Industries manufactured Goon Doc that resides from Slugterra, while the other has an unknown origin (referred to as "The Goon").