Kaiszer
Green Slime
<<<SPOILER?>>>
Solutions...
Anyway, I give up then
I found a chest I didn't before, but it didn't count as %, so I still miss 2%. I'm affraid my save game is corrupt somehow.
The only thing that would make sense is the last quest that you can't complete with "your" father, adding the last 2%.
I don't think Arcade mode has anything to do with Story % as the characters are unrelated(unless the Style items from Arcade which goes to the Story characters do count as %). Or Arcade Trophies...