The user is able to enter a state which allows dragon-like abilities, skills and traits with draconic capabilities and powers that transcend all of the users basic limits whether physical, spiritual, mental and so on.
Ninja Turtles (Teenage Mutant Ninja Turtles; 2003 TV series)
Ninja Tribunal (Teenage Mutant Ninja Turtles; 2003 TV series)
Oroku Saki (Teenage Mutant Ninja Turtles; 2003 TV series)
Duncan Rosenblatt (Firebreather)
Sol Badguy (Guilty Gear)
Eizen (Tales of Berseria)
Vegeta (Dragon Ball Heroes) harnessing the power of Super Shenron to access Shenron Mode.
When Natsu Dragneel (Fairy Tail), like all Dragon Slayers, uses the Dragon Force, they effectively turn into a humanoid dragon, taking on the physical characteristics as well as the destructive power of one.
Corrin (Fire Emblem Fates) uses Dragonstones to assume his dragon form.