Originally Posted by pinkpenguin88
I have read a thread about this, what you need to do it go into the bonus/treasure levels again and any treasure chests that are flashing are registered, ones that aren't haven't, it's a glitch the game's got, but once you get it for the second time it should work.
Ha ha, I forgot I posted this. I have long since got 1000/1000 lol.
But yeah, you're right. I just did the bonus level again and it appeared.