Using the Shadow Clone Technique, Naruto divides himself in five. As they yell "U-ZU-MA-KI", the four clones kick the enemy into the air. Then, while the enemy is floating in mid-air, the final body assaults it with a rotating heel drop while yelling "Naruto Rendan!". The name of the technique is directly lifted off Sasuke Uchiha's Lion Combo, which was based off of Lee's taijutsu. However, it can be said to be a Naruto-original ninjutsu.
While this technique is the same as the Lion Combo, it is given a higher rank because of Naruto's use of shadow clones.
In the Clash of Ninja series, Kakashi can perform this technique by copying it with his Sharingan.
In Part II, Naruto appears to stop using this technique and is not seen performing it until his final fight with Sasuke, although he still frequently uses shadow clones. In the Naruto: Shippūden episode 196, Naruto impersonated Sasuke and briefly referred to the technique as Lion Combo. Although technically it is a Part II episode, it is an anime-exclusive episode and also a flashback episode of Part I.
In the anime, Naruto seems to perform this technique in different ways depending on the situation. The only part that doesn't change is the final kick while the target is airborne.