Onix is a rock/ground type pokemon. Onix appears as a rocky-snake pokemon..
(Mountable) "Onix used harden, Onix used harden, Onix used Explode" -What not to do
After catching. Obviously there is some issue with animation going on.
Before catching. Had to throw ball
on the block with its shadow to even engage it.
Shiny Onix below a normal one.