Yachiru's stats are on this page here:
http://inubros.net/bleach/log/2005/10/bleachheight.html
The bottom note mentions something along the lines of: "The stats posted above are those of on the game (assuming that's a bleach game) site. Further corrections will be made if the official character book stats differ."
But Yachiru's official statistics aren't included in that character book post, so...
