After a failed 100% run at the start of the year I think I've finally mentally recovered enough to possibly try all over again B)
Basically the problem I encountered was that 3 outfits never unlocked no matter what I tried:
- Sailor Costume A
- Sailor Costume B
- Rose B
The sailor costumes are listed on a few guides and walkthroughs as being to do with getting an S rank on a level and an S rank on the game respectively - I tried everything I could with these, replaying levels, getting S ranks on every level consecutively and so on, but couldn't even get Sailor Costume A. Rose B seemed to have absolutely zero unlock information whatsoever (and I went a few Google pages deep too!).
If anyone has any information on these at all - even if you can let me know if you managed to unlock these at any point during your own saves, to know they're attainable, please let me know! I ran the game on PAL PS2 at the time and interestingly returned to my 2010 saves to find I had unlocked the two sailor costumes there - so I think they are definitely attainable just perhaps not using the method described? Rose B still remains an utter mystery so any information at all would be really valuable!