Zoruagible
Lover of underrated characters
Brock will easily fix most of that lolThe only companions who havent made any cameo/flashback or appearance in JN (JN075) so far:
-Misty
-Max and May
-Clemont and Bonnie
-Serena
Even Tracey did, even if it was just a mention. Same with Brock. Cilan made a flashback cameo in JN065. Iris, Aloloan gang sans Lillie (she appeared through a letter) and Dawn in JN074/075
If Serena still likes Ash, I hope Brock gets to meet her just for the reaction it'd give him