[DecadeW Climax]

Netflix has every season execpt (I think) the latest one, Super Ninja Steel. Every season after In Space is not connected so you can watch any season you want after that out of order unless you want to watch them chronologically to see the evolution of the series (although the show was 480p and 4:3 until 2010 so there's not much evolution). If you don't want to waste your time, the worst seasons imo are MMPR, Zeo (meh), Turbo (although if you want to get the full experience of In Space watch all the episodes including and after Passing the Torch Part 1), Lightspeed Rescue (this one is a bit too mediocre for my tastes), Wild Force (this one's ok but I can't get into it), Mystic Force, Operation Overdrive, Samurai, Super Samurai, Megaforce, Super Megaforce, and Dino Supercharge. My recommended seasons are In Space, Time Force, Dino Thunder, and Jungle Fury. My personal favorite and must-watch season is RPM. Hope this helps!