Pokemon Brock's Onix 21 Like new Mercari Brock's Onix #21 Prices Pokemon Gym Heroes Pokemon Cards Zekrom ex #172 Prices Pokemon Black Bolt Pokemon Cards Zekrom EX by aschefield on DeviantArt A post for the very first gym leader that you challenge in your journey and both of Brock's closest Pokemon. Onix is his ace in the video games and Vulpix was a Zekrom EX (BLACK WHITE RARE) : 172 086 SCARLET AND VIOLET BLACK BOLT ACE GRADING Graded Card