"Robot Battle Royale" is the forty-fifth episode in the Sonic Boom television series. It first aired on 31 August 2015 in France and on 26 September 2015 in the United States.
In order to prove that he is an inventor like Tails, Knuckles challenges Tails to enter the local robot battle; little do they know Eggman has also entered the contest.
- Child Monkey
- Comedy Chimp
- DangerCo Deadly Equipment Warehouse Worker
- Dave the Intern
- Dr. Eggman
- Eggman Sr. (Mentioned)
- Fastidious Beaver
- Hypno-bot (First appearance)
- Lady Goat
- Lady Walrus
- Leroy the Turtle
- Mayor Fink
- Mike the Ox
- Mrs. Vandersnout
- Old Monkey
- Photographer's assistant
- Professor Cluckins
- Soar the Eagle
- T.W. Barker
- Team Sonic
- Vacuu-Fan 2000 (First appearance)
- Walrus Child
- Walrus Male
- Wild Cat
- Willy Walrus
- Zippie (Mentioned)
- For the transcript of this episode, see Robot Battle Royale/Transcript.
At the beginning of the episode, Sonic, Knuckles, Amy and Sticks are watching TV at Amy's House when Tails shows up and introduces his new invention: a Super Antenna that can broadcast programs from the past. He uses it to broadcast an old radio program, and the others are fascinated by it. Then, Knuckles takes the antenna and uses it as a back scratcher. Knuckles feels proud that he invented something new. Later on, Tails is in his workshop when Knuckles comes in and uses a staff to turn the lights on and off. Knuckles looks for new things to invent, but he points at a turkey sandwich and talks about things that already exist.
The team is then eating at Meh Burger when Knuckles arrives with a flyer for Robot Battle Royale, a competition where robots fight each other in no-holds-barred matches. Tails declines to participate at first, and Knuckles burns him by calling Tails "chicken". Knuckles continues to call Tails names, and the rest of the team goes crazy. Finally, Tails accepts Knuckles' offer. The scene shifts to the competition site where Mayor Fink is analyzing the players' robots. Among them is Tails' robot Hypno-bot which can take control of any robot within a certain area and Knuckles' shoddily-made Vacuu-Fan 2000. Dr. Eggman then arrives with his own robot, an enters the competition. The key to the robots' override codes are then placed in a cannonball and shot into the ocean so nobody cheats (though the mayor admits the key actually had nothing to do with the competition). Robot Battle Royale then starts, with eight inventors competing in a single-elimination tournament. Knuckles' Vacuu-Fan 2000 gets defeated in the first round, while Tails and Eggman advance to the finals. As the final match commences, Tails' robot starts malfunctioning, and Eggman reveals that he got the override codes, the reason why being that Eggman Industries made the lockbox. Eggman wins the match, much to everyone's disappointment, and then proceeds to go to Tails' workshop in his Eggmobile, planning to use Hypno-bot to take control of his inventions.
Back at the workshop, Team Sonic hides behind some crates, and then Knuckles and Tails come up with a plan. Tails gets inside the Vacuu-Fan 2000 because of it having no override codes or A.I. to hypnotize, planning to sneak up to the Hypno-bot so he can reverse Eggman's control over it. Amy tries to attack the robot, mistakenly believing it is hypnotized, but she gets pushed aside by Knuckles. While Eggman gloats, Tails is able to reverse the controls. Hypno-bot hypnotizes Eggman's robots, allowing Tails to order it to make them and Tails' hypnotized inventions dance; unable to watch his plan falling apart, Eggman leaves in shame. Tails thanks Knuckles for his hard work, and Sonic remarks that with Tails' Hypno-bot in tow, Eggman's robots are no longer an issue. However, the Hypno-bot is suddenly destroyed by one of the other robots from the competition.
- The song that the robots dance to at the end of the episode is based off "Wannabe" by the Spice Girls.
- Some of Tails' inventions form earlier episodes make an appearance in this one:
- Tails' Eye Swatter used the same model as Sonic's Swat-a-pult in "Don't Judge Me".
- This episode aired in France as the forty-sixth episode in the series.