Answer:
John Lennon sang about being this toothy creature.
This noble creature has the embarrassing inability to get up once it's been flipped onto its back.
A pony trots his way through the world on these.
What peels like an onion but still remains whole?
I am known for my long trunk and large ears. What am I?
I touch the Earth, I touch the sky, but if I touch you, you’ll likely die. What am I?