Robot Rumble Arena

The  is a limited-time premium building that was released on April 7, 2021, as part of Act 1 of the Rise of the Robots 2021 Event. Upon completion, Robot Rumble Announcers are unlocked.

Regular
Carnage Destructicus Chief Knockahomer Robot Rumble Announcers
 * Look for a Good Fight - 12h
 * Practice Mallet Whacking Techniques - 8h
 * Call a Sumo Match - 4h

Event Quest Based
Bart Carnage Destructicus Chief Knockahomer Cyborg Bart Homer Lisa Professor Frink Ralph
 * "Coach" Chief Knockahomer to Victory - 4h
 * Laugh at Ralph-O-Cop Getting Beat - 4h
 * Watch in Horror as His Robot Loses - 4h
 * Follow the Pos-i-bots Into Battle - 4h
 * Balk at Robots Joining Forces - 2h
 * Smack Bart Around - 4h
 * Defeat Smashius Clay - 4h
 * Lose Robot Fight - 4h
 * Fight Pos-i-bots - 4h
 * Rat Out Bart - 2h
 * Distract Robots - 60m
 * Infiltrate Robot High Command - 2h
 * Battle Carnage Destructicus - 4h
 * Dongle Smashius Clay - 60m
 * Enjoy Watching Chief Knockahomer Win - 4h
 * Worry About Smashius Upgrades - 4h
 * Be Impressed by Upgraded Smashius Clay - 4h
 * Abhor Violence but Hope for the Best - 4h
 * Grab Bart and Escape - 2h
 * Come Looking for Bart - 60m
 * Be Ashamed of Smashius Clay's Defeat - 4h
 * Cackle With Mad Glee - 4h
 * Celebrate Victory - 4h
 * Be Sad Ralph-O-Cop Lost - 4h

Trivia

 * Only one can be obtained.
 * It can be placed on grass, pavement, dirt, krustyland road, boardwalk, pier, edge of boardwalk, or edge of pier.