[@tipssyCalibrator]
Oops, my bad. I missed the part where channellers are secret. However, I HAVE A SOLUTION!

So FlowerShine, they're a band of channellers who are essentially Magneto's group. Channeller supremacy and all that jazz. Their goal was to take over, but in order to do that they needed more support. Thus, they turned to getting into the news to draw out other channellers, and to do that they'd cause a stir.

Now, enter Skyblue. He beats down a particular disturbance and the government sees an opportunity. They make a sentai outfit for Skyblue, cut a deal with news agencies to take all the footage, and they turn Skyblue and FlowerShine into a children's show. The damage to the city? Planned for the filming of the show. FlowerShine? Just TV bad guys and special effects, definitely not real. Skyblue? He's living the dream of any kid his age, playing a hero and saving the world!

FlowerShine eventually gave up, settling down into normal lives in society. Skyblue wasn't quite so lucky, as he'd lost a lot of his schooling in exchange for being a hero. He's a PR boost for the Institute presently because Super Sentai Skyblue! is a popular kids' show, and telling kids they can train with a hero they know makes it much easier to convince them to come to the Institute.