I got to the end of this multi-part quest where you kill Isengrimm and supposedly get Renny. After killing Isengrimm I could not interact with Renny, so I immediately thought ‘bug’, great.
I checked with my partner who had already completed the quest and they said they had the same issue with Renny not being clickable, but that when they next checked their post box, there he was.
I waited, checked post box, no Renny. Decided to abandon the quest and re-take it - tried three times but same bug.
Finally made out a ticket, one day later I get an automated response, ‘too busy to reply’, telling me to abandon and retake, delete addons etc.
I followed the instructions and this lost all my dozens of pet battle teams set up in Rematch - thanks a bundle.
I happened to be passing Clarion Song who gives the quest and lo and behold, she has a ? over her head! I complete the quest, check post box over next couple of days but no Renny.
Now I have another ticket response saying ‘yes we are aware of the bug, do something else instead for now’.
The quest is no longer available either to me or to any of my alts now after all my efforts, so I guess I will never get the pet that I tried so hard for unless someone knows different?