Pretty Rhythm (プリティーリズム, Puritī Rizumu) is a Japanese arcade game series and multimedia franchise produced by Syn Sophia and Takara Tomy Arts aimed at girls in elementary school. The Pretty Rhythm franchise was first launched in July 2010 with the rhythm and dress-up arcade video game Pretty Rhythm: Mini Skirt. After the original Pretty Rhythm games ended service in July 2014, Takara Tomy began publishing the PriPara Series in 2014 to 2018. It was then followed up by Kiratto Pri Chan in 2018 to 2021, Waccha PriMagi! in 2021 to 2022, AiPri Series in 2024, with all series grouped under the collective name Pretty Series (プリティーシリーズ, Puritī Shirīzu). A spin-off media franchise, King of Prism, was launched in 2016 focusing on the male characters featured in the 2013 anime Pretty Rhythm: Rainbow Live, which was aimed at an older female audience.

The popularity of the games has led to several anime and manga adaptations. In addition, the Pretty Rhythm franchise has also inspired a junior apparel brand, Prism Stone. In 2012, one of their fashion events previously held the Guinness World Records for having the most models modeling on the catwalk.

The Pretty Rhythm arcade games were created out of demand for the lack of arcade games targeted towards young girls in supermarkets. As Syn Sophia had produced the Style Savvy series, Takara Tomy Arts asked them to collaborate on another game for the same demographic. The development team gave the game a fashion focus, particularly on the idea that players could receive a "Prism Stone" to accessorize their outfits with every ¥100 they spend. The development team also intended for the game's presentation to be like the Cirque du Soleil, where they finally came up with the concepts of "dance", "skating" and "jumps." To create the Prism Jumps, they referenced videos from figure skating competitions and added special effects to make them more visually attractive, with names for the Prism Jumps that were easy to remember. A costume designer designed the clothing in the game, and programmer Daisuke Kato attempted to balance the varieties of clothing in order to encourage the player to try different outfits. Pretty Rhythm went into development in 2009 before releasing in July 2010 with Pretty Rhythm: Mini Skirt.

The Pretty Rhythm series focuses on Prism Stars, idols performing figure skating routines through song and dance with special moves known as Prism Jumps. The characters participate in Prism Shows, live performances that are scored based on how charmed the audience is. The game is a rhythm game where players must match the beat of the song by pressing buttons corresponding to the pink and blue hearts on the screen. The game costs ¥100 to play for solo mode, and beginning with Pretty Rhythm: Rainbow Live Duo, costs ¥200 to play duo mode. Each machine is compatible with Prism Stones, collectible heart-shaped gems containing custom clothing for the player character, and Memory Passes, which allow players to save their game's progress. Five different types of Prism Stones, each representing a clothing category, can be used at the same time during game playthrough to customize the player character's appearance, with certain clothing and stage combinations providing bonus points. Players are awarded Prism Stones, which are deposited from the machine, before the game begins.

Pretty Rhythm: Mini Skirt, the first version of the game, was launched in arcades on July 15, 2010. At the time of the game's launch, a total of 84 variations of Prism Stones were produced, featuring approximately 200,000 possible outfit combinations. The game also included the song "Mini Skirt no Yosei" as a playable stage, which was performed by then-trainee members from AKB48, Miyu Takeuchi, Anna Mori, and Haruka Shimada under the group name Mini Skirt. The season 2 update of the game, the "Fall Collection", launched on October 14, 2010. For a limited time, the members of Mini Skirt were featured in a playable stage that awarded players a Prism Stone with their uniforms, and they were featured in promotional material regarding the expansion. Season 3, "Collection Season 3", launched on January 20, 2011.

Beginning with season 4, the game was relaunched under the name Pretty Rhythm: Aurora Dream on April 28, 2011 to coincide with the anime adaptation tie-in, with Aira Harune added as a playable character. The game also featured a new system called a "Surprise Jump." Season 5, "Bato Pon Edition", launched on July 21, 2011. Season 6, "Idol Debut Edition", launched on September 29, 2011. Season 7, "Pretty Remake Edition", launched on December 15, 2011 and added Mion Takamine as a playable character. Season 8, "Prism Queen Edition", launched on February 12, 2012.

Pretty Rhythm: Dear My Future was launched on April 26, 2012 with its season 9 update, "Prizmmy Debut Edition", as a tie-in to the animated adaptation of the same name, which included new characters Mia Ageha, Reina Miyama, Karin Shijimi, and Ayami Oruri, fictional versions of the girl group Prizmmy. The game featured a new system that focuses on "Prism Acts." Season 10, "Pretty Debut Edition", was launched on July 19, 2012, adding Hye-in, So-min, Shi-yoon, Chae-kyung, and Jae-eun, the fictionalized versions of the girl group of Puretty, as playable characters. Season 11, "Dear My Future Team Shuffle Edition", was launched on September 27, 2012.

Pretty Rhythm: Rainbow Live was launched on April 18, 2013 as a new series and tie-in to the animated adaptation of the same name, which introduced a new mode called "Prism Live", where the player character can enter a bonus round to score more points with Prism Jump combinations. Pair Friends were also introduced in the game. The session 1 update was titled the "Prism Live Debut Edition" and added Naru Ayase, Ann Fukuhara, and Ito Suzuno as playable characters, along with Rinne, who had previously appeared in the Nintendo 3DS game Pretty Rhythm: My Deco Rainbow Wedding. The session 2 update, "All Rare! Ki-ra-me-ki Days Edition", was launched on July 11, 2013, and added Bell Renjoji, Otoha Takanashi, and Wakana Morizono as playable characters.