And I've 100%'d it.
Can anyone read Japanese and know what this says?
"Thank you Mario! But our princess is in another castle"
...actually the google translate app on my phone tells me it says
"You can check the box technique of the book of get I pause screen in 'Jaco technique of writing'."
- bit rough but you get the idea I guess.
When I finished the main game with all the crowns, some of the text seemed to say something about a new mode/feature where it would score/rate you doing all the levels in a world in succession, but I haven't found any sign of it, any ideas anyone?