This is a muscle growth series focusing on characters from the entire universe of Sonic the Hedgehog, including the less known ones. This is also requested by  backyardgameboy

Here, Speedy, the son of Battle Kukku the 16th, was sent to one beach, visibly filled with mess left by the big, muscular citizens of New Mobotropolis. Although unsure why, Speedy was nevertheless ordered to find anything evident regarding the latter's recent activity. The only thing so out of place the bird could find was some cyan-glowing carved stone, much to his confusion.

However, the said stone started its take, transforming Speedy into a bigger, stronger but harsher form of himself, having outgrown his usual outfit. He growled for a bit and then made some poses to check himself out. Now bearing an arrogant grin, he flew back to the Battle Fortress, where he ended up transforming almost all of the Battle Bird Armada into muscular and sexy birds, following no one but Speedy himself. While the few escaped in defiance, Speedy's father was spared and banished to stay in a cliffside outpost alone. Speedy now had taken control of the Battle Fortress, left out a loud, evil laugh, and made his first order to his Armada, set on a venture against another flying familiar vehicle in their sight.

Mobian Muscle Growth:
ALL || CYAN || PURPLE || RED