|Species||Undead, Dog, Zombie|
|Introduced in||"It Came from the Nightosphere"|
|Latest appearance||"Everything Stays|
Schwabl is Marceline's pet zombie poodle. He appears in "It Came from the Nightosphere" inside Marceline's house. He is behind Finn most of the time and walks into another room when Finn starts beatboxing.
Schwabl is fluffy and white with black eyes and a black nose. With a tuft of fur on his tail. He looks like a normal poodle.
- Pendleton Ward has confirmed that Schwabl is based on his friend Marie's dog who has the same name. Schwabl is a white male poodle that has recently passed away and is seen on the show as Marceline's zombie dog that roams around her house.
- In "Marceline's Closet," Jake uses a dog door to enter into Marceline's house. It can be assumed this was built for Schwabl.
- Schwabl is shown when Marceline was young, so he is either inmortal or has a very long life