Power Rangers is... weird. There are 26ish seasons, some of which exist in the same universe, some of which are in alternate realities, and then the two movies + comics are in completely different universes.

Starting in 1998 there's a new cast every season, and other than an occasional crossover episode and maybe an offhand mention of Power Rangers being around since Rita attacked, every season is pretty much self contained.

(It makes tagging very very difficult on AO3.)

You already accepted a few Kamen Riders, which are in a similar situation, so I just wanted to make sure! Thanks!