Unikitty! Season 2 Episode 21 - Prank War Episode Title:Prank War.Episode Description:At the Zoo, Master Frown pranks the gang, which prompts them to devise plans to prank him back. Unikitty wants to prank too, but doesn't seem to understand the concept of a prank when she believes they are too mean, pranking Master Frown nicely instead of in mean ways, which worries the rest of the gang.