Mighty Morphin Power Rangers
In the first episode we first see Alpha 5 with Zordon in the command center. When Rita Repulsa was released on the moon, Zordon deemed Alpha 5 the task of finding 5 teenagers with attitude. From there on out throughout the Mighty Morphin series, Alpha 5 with the help of Billy Cranston, created the communicators, a set of Zords. And when times got really hard, both Zordon and Alpha 5 created the White Tiger power coin, in thus, creating the White Mighty Morphin Power Ranger a.k.a Tommy Oliver.
Alpha 5 stays with the Power Rangers until the Turbo season when both Zordon and Alpha 5 leave planet Earth.
Power Rangers Turbo
Enter Alpha 6, he remains at the Power Chamber. Alpha 6 still stays loyal to the Power Rangers all the way through the series into Power Rangers in Space.