its true guy wanted to learn the chidori but kakashi showed him then after u help kakashi get rid of guy then after u get rid of guy he teaches u the chidori
you cannot give it to lee, kimimaro, any of the sound four and i think those are the only people who can't learn it. i don't know if konohamaru can, but that would be funny.
I gave chidori to Hinata, which might actually be possible. The reason why Kakashi didn't teach Naruto the Chidori is because of the tunnel vision that people get when they use it. People with Sharingan, however, do not have the drawback of poor vision while executing the jutsu. If the Sharingan can nullify that side effect, then maybe the Byakugan can, too.