The poor guy just seemed to look for love in all the wrong places throughout his journey with Ash. There were barely a handful of times where a girl even has feelings for the ex-breeder and even then it was only until the end of an episode when they had to part ways.
Anyway, which rejection of Brock was your favorite it could have been the one that had you dying laughing, crying out of sorrow for the poor guy or just made you happy because Brock could do better anyway?
When I say “girl blocker”, it means the character that was your favorite in terms of preventing Brock from making a fool out of himself. Crogunk using Poison Jab, Misty and Max pulling his ear, etc. all of them had their own hand in it even Ash did it a couple of times along with a Joy’s Chansey and a girl’s Bellossom in one episode.