The Turtlelorian

This is a Mandalorian X TMNT AU

In this AU, Raphael is known as Rafa, he was separated from his brothers and father shortly after mutation on his former planet. He was founded by a Mandalorian Warrior at a young age. The warrior rescued him and was taken in as a foundling by the Mandalorians, who trained him in the Fighting Corps and took care of him. Years after receiving his helmet, Rafa quickly became one of best bounty hunters in the guild as an adult. Due to his mutation and turtle-like armor, the other Mandalorians called Rafa "The Turtlelorian." At first he took it as an insult, but he got used to it and eventually claimed it as his title-name.
That's only the background of Rafa's story. The real beginning of his story starts when he comes across an egg of an alien turtle with powers unlike anything Rafa has ever seen. It will soon be Rafa's quest to return the kid to his kind. He will meet new and old faces and an old foe, one who he hadn't heard of since he was a youngling.

"This is the Way."