Walden's Delightful Dress Up is one of the three Wow! Wow! Wubbzy! games, along with Wubbzy's Wow! Wow! Ring Catch and Widget's Build a Robot, that was posted on NickJr.com months before the show aired.
Wow! Wow! Wubbzy!: Walden's Delightful Dress Up (Online Games)