Answer:
When I live I cry, If you don't kill me I'll die.
What stays on the ground but never gets dirty?
i'm popular for Knuzlocks what am i
Face with a tree, skin like the sea. A great beast I am. Yet vermin frightens me.
A mile from end to end, yet as close to as a friend. A precious commodity, freely given. Seen on the dead and on the living. Found on the rich, poor, short and tall, but shared among children most of all.
I am your mother's brother's only brother in law. Who am I?