What happens when you gather all 100 stray beads in Okami

That's simple. Once all 100 stray beads are collected (I mean by beating the game at least once because the last one is received by beating the game XD) you will get a notification on the bottom of the screen where the text always goes. It says, "The 100 stray beads have been found and have formed the Holy Artifact the String of Beads." or something like that while it plays happy music. That then makes Ammy's attack 10x stronger and her solar energy and ink pots infinite. It took me 3 or 4 playthroughs to get all of them.