Perfect

Perfect (究極体 Kanzentai) is the term used which refers to the 5th stage of Digimon evolution, also referred to as level V. (Dub: Ultimate).

Perfect Digimon are those that survived the toughest part of evolution and are now among the strongest Digimon. They evolve from the Adult form and sometimes, though very rarely, can evolve onto Ultimate.

(Note: "Kanzentai" is literally translated as "Perfect Body" and is an official translation by Toei. However, it has also been translated in the fandom as "Complete Body" which is equally synonymous.)