Ninja turtles

1 day the turtles were exploring an abandoned apartment trying to find a villain but that's when they heard crying and they saw a crib with a little baby in it. They decide to take the baby and have them as their little sibling. They're based off of the 2012 ninja turtles and they have the ability of changing into humans and into their mutants turtle forms. (You pick your name, gender, what weapon you have in the future, etc.)