Square Enix Holdings Co., Ltd. (株式会社スクウェア・エニックス・ホールディングス) is a Japanese video game developer, publisher, and distribution company. It is best known for making role-playing video game franchises, having created well-known titles such as Final Fantasy, Dragon Quest, the Chrono series, the Mana series, and (in collaboration with Disney) the Kingdom Hearts series. With Nintendo, Square Enix has produced a strong number of exclusives including Final Fantasy Crystal Chronicles, The World Ends With You, the Bravely series, Octopath Traveler, and several Mario games: Super Mario RPG: Legend of the Seven Stars, Mario Hoops 3-on-3, Mario Sports Mix, Itadaki Street DS (Japan only), and Fortune Street. The original Square Enix was formed as the result of a merger between Square and Enix on April 1st, 2003. Since then, Square Enix has also acquired the Taito Corporation and Eidos Interactive, bringing numerous franchises including Space Invaders, Bubble Bobble, and Tomb Raider into the Square Enix fold.
In the Super Smash Bros. series, they are the original creators of two guest characters that appear as playable fighters: Cloud Strife from Final Fantasy VII and the Hero from the Dragon Quest series. They also supplied additional content from their work on the Nintendo-exclusive Super Mario RPG: Legend of the Seven Stars.
One of Square Enix's flagship characters, Cloud Strife from the Final Fantasy series, appears as a playable character in Super Smash Bros. 4, announced during a Nintendo Direct on November 12th, 2015 as downloadable content along with a stage based on Midgar, the songs "Let the Battles Begin!" and "Fight On!", and a Chocobo Mii Fighter hat.
The Hero from Dragon Quest also appears as part of Challenger Pack 2, being announced at E3 2019. He is not based on one single Hero; he is represented by the Luminary from Dragon Quest XI, Erdrick from III, Solo from IV, and Eight from VIII, with the Luminary being the default costume. He brings a stage, several music tracks, and a multitude of spirits. Additionally, multiple Dragon Quest Mii Costumes released at the same time, including Veronica and Erdrick for the Mii Swordfighter, a male and female Martial Artist costume for the Mii Brawler, and a Slime as a Mii Fighter hat.