A "cub".
bear cubs
a cub
a cub
A "cub".
You would call a baby cat a kitten.
A baby bear is called a cub. Bears are mostly found in South America, North America, Europe and Asia.
my little brother
Most commonly english speaking people will call a young bear a "cub."
If you dont like that tell them not to call you that. But if you dont mind call him baby, boo, love, sweety, hun.
This description fits the koala. However, it is not strictly correct to say a koala is bear-like, as it is not even remotely related to bears. Koalas are marsupials, but bears are placental mammals.
a baby bear is called a cub.
A baby koala is called a joey. It is not a 'cub', as it is not a bear. All marsupial young are called joeys.