Hyper Missingno
Well-Known Member
Because Ash is the main focus of that episode and Gengar is targeting him. It would not be great for Gou to catch a pokemon that is targeting Ash and has cursed him. Golurk was never hinted to go to Ash to begin with since it appeared in the Scan along side Go. I still believe Ash will be the one to catch Gengar regardless of whether anyone wants another Kanto mon on his team.
We're not really sure whether that episode is Ash-focused episode or not; we only know the title and really short summary. So, the story can go either way like Ash overcome Gengar's power or Go saves Ash. Even though some people think it is not great, but there is still possibility about Go catching Gengar might happen (like many people assumed that Go unable to get strong Pokemon).
So, unless we get at least longer summary on next week, we can't really be sure at this point.