Not bad the first 2 games are pretty identicle, the 3rd one theres a little change but the 4th game is a good little NES platforming gem.
We moan about sequels being the same nowadays but at least they werent THIS samey.
Stole this info from another site:
"Back the mid 80s, Escape made up of a couple of ex Sega employees (hence the name Escape...) they made Wonderboy on the Sega System 1 board. Sega licenced and published it.
Escape became Westone and Westone then promptly licenced Wonderboy to Sega, however Westone did write a Famicom version, due to Nintendos licencing policy they couldn't release it so they sold it to Hudsonsoft who had to change the main character and name (as Sega owned the licence to the Wonderboy name and didn't want a third party game to have any Sega name behind it). However they did release it (With no Sega or Westone branding) and due to good sales, Hudson then promptly agreed a deal with Westone that all future Wonderboy / Adventure Island games would be released by Hudsonsoft on all non Sega Machines while Sega still had a licence to publish the Wonderboy games on the Sega machines and in the Arcade"