Hey, I've got a Terebi Okaki too! They seem fairly easy to find on Yahoo Japan. I've also got one of those Korean Hang On/Safari Hunt carts. My other Korean games: Naughty Magpie Olympic Gold Barcelona 92 Super Boy II Penguin Adventure Street Master Korean Aladdin System (SMS2) with built in Alex Kidd (Korean text).
I REALLY wish I had that Opa-Opa key chain... Bock, you wouldn't want to trade it for a Space Harrier keychain from the same series, would you?