Look I hate the fact that raine got possessed by belos just as much as everyone else, but let's all be honest, would any of us have survived him pulling up in a grimwalker?
i know the turtles probably had to leave casey jr behind with someone to look after him when he was a baby when they went out on missions but i cant stop thinking about how funny it would be if they brought him along and when they got into fights they had to throw him around hot potato style to make sure he didnt get hurt
Don't think about the fact that casey was probably the only thing that kept the turtles going because he was their hope and they all wanted a better life for him.