Pre-formed teams?
 

I've noticed a lot of Sentai starts off with the 5 heroes gaining their powers, or forming a team. How many actually start off with a fully formed team that already has powers, though? The only ones i've seen are Zyuranger and Gokaiger.

Didn't shinkenger? Gosieger, Magiranger (kinda), And Deka.

I'm kinda interested in this too as I hate sentai shows that waste 90% of the show with characters feeling around their powers and finding themselves. I'd much rather they started as badassess and peppered over the show we flash back to how they were before.

I know Zyuranger, Dekaranger, Gokaiger, & Goseiger had their powers before the show started, but Dekaranger and Goseiger had not formed the team. There are a ton of seasons where the team was formed before the show started except for the the red ranger. Wasn't Ohranger already a team and had their powers as well?

From the top of my head Flashman and Maskman.

Not to be nitpicky or anything, but Zyuranger is sorta hard to say for me personally cause they are aware of their status and abilities but from the way how Barza said “these are your medals!” in episode 1 it felt like they never really utilized their powers so I will have to pass on Zyuranger but your other picks I agree.

You guys are forgetting Kyoryuger.

Everyone but Red was already a Ranger, they just kept their identities secret until Daigo raped their minds and bodies with friendship.

(NOTE: I guess Silver wasn't a Ranger yet, nor Gold, but even Cyan, Gray, Violet, and to a point Deathryuger already had their powers)

I thought all five got their powers around the same time and just met up in Japan?

Gold had his powers back in Warring states era didnt he?

Yeah but the show didn't start with everyone having their powers. They wanted to properly introduce everyone to the Daigo Show, lol.

I disagree. If Sentai was only a 26 episode series then fine, but at 50, no, just no. I want to see my characters grow and learn to work as a team like they had to do in Jet-Kaku. It just feels forced having everyone be an expert at their heroism right from the get go.