Power Rangers is one of the longest-running television franchises out there. The show's longevity stems from its constantly rotating cast of characters. This includes villains, supporting characters, and, of course, the Rangers themselves. There have been dozens of Power Rangers over the years, which means that a lot of people can become a part of the group, as long as they have what it takes.
Source：https://www.cbr.com/tv-heroes-great-power-rangers/
