Speaking of having a Wiki, I think some of the details here could be added to The Cutting Room Floor and there are already some TG16/PCE articles(some really obvious changes, like "The text are all in Japanese" may not be suitable to be added there, even though these are actually huge differences).
Since this thread has been necro'ed:
(About Wonderboy)There may be some other minor platforms these games appeared on, but I listed the main/most common ones here. Only the first game saw a port on the NES.
There is actually a port of the second game on the Famicom(unless the you straightly consider the NES to be a different platform from the Famicom) using characters from Journey to the West, and it's stated to be developed by Westone even in Wikipedia, which is questionable though, as the title screen suggests that it's possibly (co)developed by NMK. Though the graphics are so different that you may not recognise the game at first glance, it's indeed the same game, as I remembered beating it using a walkthrough for the PCE version(there were minor differences though, like some stages were horizontally flipped).