I understand what you are on about Akared became Red Sentai without Keys so maybe the other Sentai alowed them use of their keys without them loosing their powers. In Taisen Marvelouse Gokai Changed a lot

Because they are finally part of Super Sentai, so it was right to release all the power back to the original owners, but, they are still pirates after all, so they probably pirated the powers, so they can continue to use the ranger keys, it's not like the rest of the Super Sentai got their powers back and suddenly all went back to fighting monsters, how does that make sense? you have over 199 members, but only the current generation is fighting the monsters, and the old guys don't show up until it's time for a movie? It's not suppose to make sense.

If you want them to continue having the powers to change into other Sentai, that's fine.
Just don't end the damn series with them giving up their ability to do so :I

Aren't the "Super Sentai VS Super Sentai" movies supposed to be non-canon anyhow? Go back through all of these movies and you'll see things that shouldn't happen...hell, just about every Super Sentai team looses their powers at the end of their series when their henshin devices get destroyed or become useless...when all of a sudden, bam! The teams find the ability was "within" the entire time and are able to henshin. So, all this nonsense about the Gokaigers not being able to use the other powers is kind of a moot point...

Just saying :D

Its debatable, but I can't think of any that are definitely considered not canon. Goseiger vs. Shinkenger most certainly is canon.

Just let the Gokaigers be the Gokaigers. It would be a really cool premise if the Gokaigers had to fight on their own without the powers of the past Sentai. It would at least make the playing field even ( If Gobusters fought the Gokaiger the gokaiger's in their prime with their gokai change, we all know they would get their asses handed to them and thensome.)

I think it's kinda a neat idea to have god keys that let them turn into anyone of their color. That's all really...

Suddenly I can imagine Don sitting at a computer, extracting the ranger.exe files from the Ranger Keys. :lol

Haha!