[TristanJones]

The Ghostmaster, from "Jailbusters", "Short Stuff" and "Revenge of the Ghostmaster"

[TristanJones]

Loki, from "Ragnarok and Roll"

[TristanJones]

Free roamers from "Cry Uncle".

[TristanJones]

...and some more... "Cry Uncle".

[TristanJones]

...third time's a charm.

[TristanJones]

Foundry haunter, from "Lost and Foundry"

[TristanJones]

A Shuggoth, from "The Collect Call of Cathulhu"

[TristanJones]

Anubis, from "Ghostbusters in Paris"

[TristanJones]

Charon, the boatman, from "Knock, Knock"

[TristanJones]

The Guardians of the Old Ones, from "Russian About"

[TristanJones]

The Jabberwocky, from "The Grundel"

[TristanJones]

Terror Dog, from "Egon's Ghost"

[TristanJones]

Terror Dog, from "The Copycat".

[TristanJones]

Slumber ghost, from "Take Two".

[TristanJones]

The "Doomsday Door" from "Knock, Knock"

[TristanJones]

The Grundel, from "The Grundel"

[TristanJones]

The Grundel, as seen in Tobin's Spirit Guide, from "The Gundel".

[TristanJones]

Boss Pozo, from "Partners in Slime"

[TristanJones]

The Big Boo, from "Station Identification".

[TristanJones]

The Collective, from "Robobuster".

[TristanJones]

Valkyries, from "Fright at the Opera".

[TristanJones]

The Ghost of Casey Jones, from "Last Train to Oblivion".

[TristanJones]

Barrow Wights, from "They Call Me MISTER Slimer!"

[TristanJones]

Hob Anagarok, the First Demon, from "Cold Cash and Hot Water"

[Dr.D]

TristanJones, you should change your name to Tobin.

[TristanJones]

The "Phantom of the Opera", from "Fright at the Opera".

[TristanJones]

Quoatles, from "The Treasure of Sierra Tamale"

[TristanJones]

Ab-sai, from "20 000 Leagues Under the Street"

[TristanJones]

Imps, from "Janine's Day Off"

[TristanJones]

The gobbler, from "Egon's Ghost"