Arbolian Mentirososians are an alien race from the planet Arboles Mentirosos. They appeared in the episodes "Get Schwifty", "Interdimensional Cable 2: Tempting Fate" and "The Wedding Squanchers". Their planet was one of the worlds destroyed by the Cromulons, but some members of their species survived as they are shown in later episodes.
- Strangely, despite their planet being destroyed by the Cromulons, a few of them can be seen during the wedding crash in "The Wedding Squanchers", along with other recurring background alien species. This suggests some members of the species were off-world when their planet was destroyed, and thus survived the destruction.