Yeah, I was thinking Glow by Ella Henderson would be a good fit. It's ultimately a song about overcoming the struggle that comes with people trying to get in the way of a love, but I think it could also be interpreted as a song about fighting the good fight, especially these lines:
"We are fire, we are fire
And our love will burn
The flame will never die
We are brighter, we are brighter
Let's show 'em how we light up"
And this part could refer to when the Blaziken Mask and his Mega Blaziken save the day:
"Like the sun that saves the night
Bursting through a darkened sky
We are, we are, soldiers of the light"