I'm yet to even see an Onix, so I'm a bit jealous.
I must say, I'm not keen on the Gen 2 Pokémon taking over. I've barely seen any Gen 1s since the new update
Got a ton today on my first outing with the new gens. A Blissey and the opportunity to upgrade Scyther are the best of the bunch so far, with a fair few boring, rather cutesy looking Pokémon making up the rest.