Abra, Kadabra, and Alakazam, known in Japan as Casey (ケーシィ, Kēshī), Yungera (ユンゲラー, Yungerā), and Fudin (フーディン, Fūdin), are three Pokémon species in Nintendo and Game Freak's Pokémon franchise that are linked through evolution. Abra evolves into Kadabra after gaining enough experience in battle, and Kadabra evolves into Alakazam after being traded to another trainer. Created by Ken Sugimori, they first appeared in the video games Pokémon Red and Blue and later appear in subsequent sequels. They have appeared in various merchandise, spinoff titles and animated and printed adaptations of the franchise. Known as the Psi Pokémon, using self-hypnosis, Abra spends 18 hours a day sleeping, unable to utilize its abilities unless rested. This behavior ceases once it evolves into Kadabra, a strong psychic that emits alpha waves affected by its current mental state. Able to remember everything since its birth, Alakazam's IQ is around 5000 and can outperform a supercomputer. Alakazam is also one of the handful of Pokémon to be capable of undergoing Mega Evolution, which increases its strength and makes its appearance undergo a few noticeable changes.