Most people are familiar with owlbears, the strange combination of owl and bear that Dungeons and Dragons is famous for. Not all wizards were satisfied with that combination, and thus one particularly mad wizard combined a bear with a frog.
This combination resulted in a creature that was mostly not aggressive, except for a desire to tell bad jokes and sing sappy songs while playing a banjo. This particular frog bear went rogue, pulling a gun on some innocent adventurers.
Frogbear Soldier (CR 4)
Frogbear CR 4 XP 1,200 Frogbear soldier CN Large humanoid Init +5; Perception +10