Acting for Two: Some voice actors (notably Cassandra Lee Morris - Beffica - and Max Mittelman - Filbo) are among the voices heard as the titular creatures in addition to voicing a couple of the Grumpusesnote The aforementioned two voicing the Lollives (Morris) and the Crapples (Mittelman) in addition to their respective Grumpuses, for example.
Flip-Flop of God: The canon ages of the characters. The Bugsnax Reddit AMA done by the developers gave a list of age ranges for all the main Grumpuses, though the director Kevin Zuhn later claimed that there were no official ages. Given that some of the listed ages seemed slightly off compared to canon informationnote It states Lizbert to be a good ten years older than Filbo despite Filbo claiming to have known her when they were both kids, and it states Gramble's and Wiggle's ages to be even further apart with the former being in his early 20s, despite the two being in a romantic relationship, it's unclear how much of either source is true.