User blog comment:Jkphantom9/OFFICIAL: Japanese Cast Announcement!/@comment-25555436-20150610185404/@comment-10380701-20150611211232

I don't think Monty can pick the VA. VAs are hella expensive in Japan. Warner Brothers JP probably did the research themselves. Then again, the Fullscreen backing may have made it possible.

Eh. If the jokes are untranslateable, then do your OWN in-jokes. That's how the Philippine dub of Doraemon did it. And it worked.