Answer:
I never was but always will be. No one ever saw me but everyone knows I exist. I give people the motivation to better themselves every day. What am I?
Canine children.
I am a fruit. If you take away the first letter of my name I become a crime. What am I?
With three eyes and as black as night I frequently knock down ten men with a single strike!
I am the noise Santa's reindeers make
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.