Too late, but I want to help a little bit
I uploaded attachment and translated it (the origin is Klonoa2 famitsu official guide book)
but you should not trust too much. ^^;;
Good find!
Interesting that it leaves leaves room for speculation.
<_________> welp there goes my mind again. pppfpfpgfdhggtrgrtgtgtgdtgdt I think way to much.
Klonoa is a dream traveler so maybe he travels to other worlds via dreaming yeah I know that sounded redundant as hell.
But think of it as a merged dream with others and Lunatea being the whole for that time.
So in yet another theory maybe the king of sorrow who is an essence took on a Klonoa like form as he called out to him to enter Lunatea help him.
I could have fleshed that theory out more but it would get confusing to explain unless you really want me too.