Great finds, everyone! Don't know how I managed not to notice this thread till now.
Some more fun with maker codes and other header-related stuff:
* Harry Potter 3 uses "@7" for its maker code, which doesn't seem to correspond to any official licensee. However, it's very close to Takara's code (A7)...as in, literally one bit off...and there's at least one other game that uses "@7": Crazy Richman 2! So perhaps HP3 really is some sort of Vast Fame side project. It definitely doesn't jibe with everything developed by Sintax, which, as mentioned above, uses code 01.
* There are at least two other RPGs which also have a header taken entirely from Bokujou Monogatari, but which aren't from Waixing (they even have a logo for "Hitek" in the ROM). "Heroic Sword" is one of them; the other is in GoodGBX as "Bokujou Monogatari GB2 (Unl)", even though it clearly has nothing whatsoever to do with Harvest Moon aside from the header. Curiously, these also seem to share a sound engine with the relevant Waixing games...which appears to be stolen from Link's Awakening.
* Vast Fame's GBA stuff appears to use the header info from Kiki Kaikai Advance. (Maker code DF, Altron Corporation; game ID DKIJ.) That would explain why their Lord of the Rings game plays an awful lot like Pocky & Rocky, then!