When I was a kid I had the NiGHTS into Dreams... official strategy guide (the English language version, sold in the UK). I remember being surprised that it had bosses associated with incorrect levels, like Puffy as the Soft Museum boss, and Gulpo as the Splash Garden boss.
Does anyone here still have this guide book, and could anyone confirm the full boss/level associations in the book? (I can't remember if there were any other differences.)
Is there any other evidence out there that the boss order might have been changed during development? After all, Puffy fits the bouncy theme of Soft Museum and Gulpo matches the water theme of Splash Garden.