[Den-O]

Quote:

Originally Posted by Locke

Why don't the government use the same tech but a different power source? Because...FUCK LOGIC GOKAIGER.

It doesn't work that way. You have to understand the nature of the 'Precious' from Boukenger to get how their powers work. Trust me, there is a reason.

Things like the Legend War, big events like that, usually suspend whatever circumstances gave heroes their power so they can use them aagin, in cases like Boukenger. Or for like revived dead heroes like Abare Killer & Dragon ranger. It's generally assumed to be because of the concentration of Super Sentai spirit/bravery/courage/what have you that amazing things like this can happen. When the world truly needs it's heroes they return like for the Legend War. Or like when Gaoranger had the 25th anniversary and all 24 previous Red's appeared with their mecha. It's a team-up thing.

Outside of that you just have to go with the flow that the powers are gone at a certain point. And with Boukenger, outside of special events like above, there's a reason for them to be gone.