Childhood (Blossom part)

what will happen if the ppgz never be an enemy with the rrbz?.

At first all of them are childhood friend, well until all of them lost their memories and being adopted with different family. But they meet again and be friends again.

So what will they do if someone told them that , a space ship will destroy our world in 24 hours into an ashes and no one will be alive.
What will they do?