Buzz! Junior: Monster Rumble (known as Buzz! Junior: Monster Rally in North America) is the third game in the Buzz! Junior series of games. Buzz! Junior: Monster Rumble was released on 2 November 2007 in Europe. Monster Rumble was co-developed by FreeStyleGames and Magenta Software and is published by Sony Computer Entertainment Europe. FreeStyleGames developed nineteen of the twenty-five mini-games, while Magenta created the following six: Boo!, Bashing Pumpkins, Eyeball Fall, Ghoulish Golf, All Wrapped Up, & Tug-O-War.
The game was later ported to PlayStation 3 by Cohort Studios and was released on 3 September 2009 as a download from the PlayStation Store. It includes trophy support and the ability to use a DualShock wireless controller instead of Buzzers.