If you're looking for anime similar to King of Prism by Pretty Rhythm, you might like these titles.
Naru Ayase is an 8th grader who can see the colors of music when she listens to it. For Naru, who is extremely good at deco-ing Prism Stones, becoming the owner of a shop like Dear Crown was her dream. One day, she finds out that the manager of a newly-opened shop is recruiting middle school girls who can do Prism Dance, and immediately applies. Naru begins to Prism Dance at the audition, and an aura she's never experienced spreads out in front of her. At that moment, a mysterious girl named Rinne asks her if she can see "rainbow music".
The Prism Show is an all-new kind of ice skating show that requires its participants to be figure skaters, models, and singers all at the same time. Aira and Rhythm are two girls who both dream of becoming the Prism Queen. They'll have to train hard and overcome both their quarrels with each other and their blossoming interest in boys if they want to achieve their dream.
Three years have passed since the events of Aurora Dream. At Pretty Top, a new generation of girls dreaming of being Prism Stars have endeavored through their training. One day, Ayami, Karin and Reina find themselves on the same stage as their predecessors, when Mia Ageha suddenly jumps up on stage and demands to challenge the legendary Prism Show unit MARs. To keep this challenge, the 4 girls are sent to become a new Prism Show unit, Prizmmy☆. As the girls waver and then jump back up, they deepen their friendship and aim for their debut together. To add to it all, 5 girls have come from abroad to Japan to study at Pretty Top to have their debut as well. In order to meet their future, the girls stand on the stage, and the show starts.
Young girl Lala is a Prism Show student, and is aiming to become an idol. She learns the way to shine from previous Prism Stars, including Aira Harune, Mia Ageha, and Naru Ayase. She looks back to the past with her mentors to their many experiences and Prism Shows.
The story of the second season continues with Laala and her friends Mirei and Sophy, who are part of the "SoLaMi♡SMILE" PriPara idol unit, which is rising in popularity. In the PriPara amusement park, a new zone called "Dream Theater" has opened, and it's said that when a fateful five-man team filled with charm that performs there, a new event called the "PriPara Dream Parade" will be held. However, it is not known which five people make up this team, and the PriPara idols scramble give the greatest performance in the new zone.
Everybody knows it's tough being an idol, especially the girls at 765 Production. Made up of thirteen young ladies, the group constantly attempts to improve its image by taking new promo shots and booking the best gigs possible, whether it's being a concert star or a quirky cooking show guest. Led by the kind-hearted and determined Producer, these talented performers such as twins Mami and Ami, quiet Yukiho, clumsy Haruka and gifted singer Chihaya will do their best to become the best idols around.