Bunch of interesting facts this week.
Wii U VC
Mega Man Battle Network 3 (GBA): ¥702 (¥1450 in box on Suruga-ya) Okay, so titling this game Battle Network 3 is kind of a lie since that game doesn't quite exist. There were Blue and White releases in the NA and Europe, bringing the series to a Pokémon-like experience. So that makes this the original version. Except...
Mega Man Battle Network 3 BLACK (GBA): ¥702 (¥1710 in box on Suruga-ya) This is the bug-fixed, extra-content-toting, improved version. Released a little more than four months after the original version so I have to assume those bugs were fairly serious, but it warrants some more research.
Digital Champ: Battle Boxing (PC Engine): ¥617 (¥340 cart-only on Suruga-ya) In 20XX a mutant boxes against clones and robots because that's what it takes to be the Digital Champ.
Castlevania (MSX): ¥823 So. Simon's Quest seems weird and a bit "Where did that come from after the side scrolling Castlevania?" Except the MSX version of Castlevania apparently released a month after the NES version and had a bit of that design which we now lovingly call "Metroidvania".