Three-Beast Carnage is the twenty seventh event match in Super Smash Bros. Brawl. As R.O.B., the player must fight giant sized Bowser, Donkey Kong, and Charizard on New Pork City. It should be noted that the three giants will attack each other as well (since Friendly Fire in set to on), so defeating this challenge is a lot easier than it seems.
- The appearance of Bowser, Donkey Kong, and Charizard as giants in New Pork City stage is a reference to the "monster" movies featuring giant creatures destroying major cities, such as the video game Rampage. Also, Bowser, Charizard and Donkey Kong as giants can be seen as references to Gamera, Godzilla and King Kong, respectively.
- As with the Go! Triple Finish! event, the respective trainer does not appear in this event.