>>51763867Apparently it was previously undubbed material and turned into a collection of various other things, Primarily from: Pocket Monsters Side Stories. Apparently it still remains intact on internet archives. I double checked, and no, Pocket Monsters Side Stories is not on Pokemon TV.
https://archive.org/details/winx-bloom-1980-pocket-monsters-side-story-raw-480p/Pocket+Monsters+Side+Story+10+-+Rocket-dan+ai+to+seishun+no+genten+%5BRAW-WinxBloom1980%5D%5BC044B920%5D.mkv