They do. I wish it wasn't necessary, but there is no denying reality. Thankfully, Skye seems to agree with that, even without me talking to him about it. I often watch him teaching the younger Lapras. It starts out as play when they are young, but it becomes more like training when they get older.

I'm also considering teaching them all the HM moves I can before releasing them. I don't know if it will make a difference, but I want to do everything I can for them.