The Power Rangers share a universe with other superhero franchises, such as the Marvel Cinematic Universe or DC Extended Universe.
The original Green Ranger, Tommy, is secretly the most powerful ranger, even more so than the Red Ranger, due to his connection to the evil Rita Repulsa.
The different Power Ranger teams are actually part of a multiverse, with each team existing in a different universe.
Zordon, the Power Rangers' mentor, is actually a villain who manipulates the Rangers for his own purposes.
The Power Rangers are actually part of a government experiment to create super-powered soldiers, and their battles are staged for propaganda purposes.