mighty gunvolt
Mighty Gunvolt (Gal☆Gunvolt in Japan) is a retro-styled action-platforming game by Inti Creates as a spin-off to their Azure Striker Gunvolt series. It features a crossover of Azure Striker Gunvolt, Mighty No. 9, and Gal☆Gun in a Famicom/NES-styled mini-game reminiscent of Mighty Final Fight with each series' representative protagonists as they attempt to foil the Sumeragi Group's plot of hunting down idols to serve as a replacement for Lumen. The gameplay is a heavily stripped-down version of Mega Man, as players go through a small set of linear stages with only each character's standard weapon to take on legions of enemies from their respective series.
A sequel, Mighty Gunvolt Burst, was released in 2017 for the Nintendo Switch and 3DS with subsequent re-releases on PlayStation 4 and Windows PC.