We found the Menu pictures and imported them to GL6!

You read right! We found the menu pictures of GL5 and 6.
They are located in the folder

GL5_FILE.DAT / 000001e0.tm2
GL6_FILE.DAT / 0000025c.tm2

and have the file ending ".tm2".
To open those files you need to use the program called "Rainbow":

https://www.romhacking.net/utilities/1069/

A simple copy and pasting from GL5 to 6 works like a charm:

Sadly, the GL5 file is actually missing some entries, so we can't use all of it:

Fun fact:

It actually looks like that the western release was the reason we got "fancy" menues in GL6.
Here's how it looks like in the original GL5: