Originally posted by: Solensean
Very simple :

Kakashi is a pokemon : you see, first you've got kakashi, with only one sharingan, then you evolve it with a moonstone, and you've got an Uchiha.
that's so stupid....

and in response to CapsuleCorpJX. unless you read the manga...how would you know why kakashi has only 1 sharingan eye in himself? and i guess another reason why he hides his sharingan for tactical reason against enemies