Wii
A game involving putting a Wii Remote inside a physical stuffed toy character to play the game. Started development in 2008, but faced many hurdles with development and issues with Nintendo, who had strict rules about add-ons for the Wii Remote and use of the "Wii" branding in game titles (leading to the alternate name WeeWaa. The game was almost done and scheduled for a 2012 release, but lost publisher support due to the waning Wii userbase late in its lifecycle.