Alpha 5

Alpha 5 was the teenager-ish robot on Mighty Morphin Power Rangers that became famous for using the phrase "ay yi yi" in situations that involved any kind of emotion (most commonly panic). He worked in the Command Center most of the time, only getting out on a few occasions, and almost always obeyed every command and order that Zordon issued.

Alpha was built by King Lexian on the planet Edenoi.

In one episode of Mighty Morphin Power Rangers, he became evil by the forceful insertion of a disk containing a computer virus that rapidly spread to his systems.

In the episode Teamwork, Alpha made an attempt at learning how to dance Zack's dancing/fighting style, hip hop kido. He didn't do very well, as he kept causing static in the communicators.

In the Green with Evil miniseries, Alpha was given a virus by the Green Ranger and ended up feeling weak. He was later turned off by the Green Ranger, but his back-up system kicked in. He then orders the computer to activate a force field around the Ranger.

In the VHS Power Rangers special, Alpha's Magical Christmas, Alpha sings Christmas carols with a large group of children. Some of the songs are: He also sings We Wish You A Merry Christmas with Kimberly Hart (Amy Jo Johnson), Billy Cranston (David Yost), and Thomas Oliver (Jason David Frank) who mysteriously is shown throughout the special as both the Green and White Rangers! Some of the songs have a few of Alpha's special touch-ups.
 * Oh Christmas Tree
 * Good King Wenceslas
 * Jingle Bells
 * Deck the Halls
 * Up on the Housetop and
 * Silent Night.

In Power Rangers: Turbo, Alpha 5 left with Zordon to the planet Eltar to defend it from the evil Dark Specter. But judging from some sources and Alpha's not making any reappearances, he is presumed destroyed/dead, but is also believed that he may be residing there.

Alpha 5 was dearly loved by the Rangers and Zordon, though sometimes they never showed it much.

On Alpha's chest was a yellow stylized lightning bolt similar to the Power Rangers' stylized lightning bolt symbol but it was inverted. His head is always in the shape of an inflated hockey puck.

His successors include Alpha 6 and Alpha 7.

Alpha 5 is voiced by Richard Steven Horvitz.