Care Bears have interesting lore.

Care bears don't really have an age? Weird, they're mostly unknown species, why? Because They're probably born in the cloud or something, how did True Heart Bear and Noble Heart Horse kept their appearance away from humans in during the old nelvana movie. Where the stars go like who made them exist? Are they cosmic beings? Where did the magic came from- stop.

Let me explain with little to no info.

There's probably anthropomorphic animals before Care bears. There's three magical beings that is filled with evilness, No Heart, Dark Heart and Cold Heart that probably gave the world unhappiness, and evilness in both human and anthropomorphic (why didn't I say bears? Because The cousin exist duh.) world. In second nelvana movie, I have a theory that Dark Heart is a being that captures other creatures or beings to get new forms or powers. By getting a human boy with really reddish hair that I don't know if I could count it as ginger. And the reason why True Heart Bear and Noble Heart Horse are literally in the ship in the beginning with little babies bears. Probably in my theory that Dark Heart destroyed their homes and True Heart Bear and Noble Heart Horse were adventurers or explorers but when they came back they saw their own home and families are dead expect the bears and the cousins. So they fled in their ship to find safety, fought Dark Heart before being granted powers by magical (I called them the Head Star) Head Star, a being will give magical powers to those who have heroic traits which True Heart Bear and Noble Heart Horse. The Star probably named them that and Noble and True ditch their old name for the better.

Why did the cousins and bears separated? Because that In the end, Dark Heart become caring to a girl name Chrissy or Christy but is Dark Heart a demonic being that shows to have a vibe or a feel that he's older than Christy because she a young girl and He's old. So in my explanation: Dark Heart can't shape shift, he took forms of other life form. So his life form of a boy finally escape when he (not Dark Heart but the boy?) feel caring to Christy. And also the reasons why Care Bears and Cousins don't remember each other cause Noble Heart Horse and True Heart Bear separated due they fear Dark Heart coming back to took them down so they separated so He (Dark Heart) won't take them away. It kinda sad really.

Dark Heart probably corrupted two beings No Heart and Cold heart who spreads evil and uncare the world. In Unlock the magic (YES WE'RE MERGING TWO THESE THINGS LORE TOGETHER YOU HEAR ME LOSERS!) No Heart necklace or amulet changes to green I think when he feels care for the first time.