I once found a
Japanese QuackShot in a charity shop, next to PAL Sonic 1 and Space Harrier II.
...I had a copy of Alex Kidd in the Enchanted Castle with a Mega Drive manual instead of a Genesis manual in it traded to me by Wildbil here, and he picked it up from Goodwill.
*SCOFF* Buncha third-rate wanna-bes, the whole lot of ya.
I once found
six Japanese Mega Drive games at a Goodwill, and all but 2 of them were CIB. (the others were missing their manuals)
Sadly, the one title out of the bunch that I really wanted to play--
Gunstar Heroes-- wouldn't play on my Genesis machine, even with the assistance of a Game Genie.
Go figure.