Here is the full stream for Kamen Rider OOO Episode 46: "The Eiji Greeed, the Double Births, and Ankh's Desire." In this episode, Eiji finally transforms into a new Greeed! Will he ever transform into OOO again?
After Mezool is destroyed, Gamel becomes complete, he attacks Eiji. Eiji falls into the sea, after a while he wakes up, he starts walking but staggers. Suddenly the eyes of Eiji becomes purple, then even his left hand turns into a Greeed hand. When Eiji finally regains conscious, his OOO Driver disappears...
Watch Kamen Rider OOO Episode 46 SUB Here
Part One | Part Two
With Doctor Maki transforming into the Dinosaur Greed, he approached Eiji, who is in turn under the influence of the purple Core Medals. Doing something resulted into Eiji transforming into a full Greeed. Hence, Eiji can no longer revert back into a human being.