I dont think golbat is that problematic for yanmega either, assuming you can run psychic on your sets, but why is it even considered to drop to begin with?
I don't necessarily dislike this suggestion, but I also don't see this being needed, at best would be a very small QoL and it would 100% be used just to search for Devs OTs, old NPC OTs etc, idk if any good would come from it