Ultimate

Ultimate (究極体 Kyuukyokutai) is the term used which refers to the 6th (and beyond) stage of Digimon evolution. (Dub: Mega).

Ultimate Digimon are those who have attained the final stage of evolution. Rarely encountered, these Digimon tend to be extraordinarily powerful. Evolution is still observed, though rarely, to other Ultimate Digimon. Ultimate II is extremely rare, with Ultimate III only having one instance, Imperialdramon Paladin Mode. Ultimate II is sometimes referred to, particularly in Digimon Adventure V-Tamer to Digimon characters only) as "Super Ultimate" (超究極体 Chou Kyuukyokutai).

(Note: "Kyuukyokutai" is literally translated as "Ultimate Body" or "Final Body". For the dubbed "Ultimate" level, see Perfect.)

DigiTama -> Baby I -> Baby II -> Child -> Adult -> Perfect -> Ultimate (-> Ultimate II/Super Ultimate -> etc.)