Angry Birds Go! was a racing kart game similar (but much worse in comparison) to Mario Kart that was released in 2013 for mobile platforms. In the game, you race against your opponents. There are also different modes in the game.
Commonwealth planned to release plush toys of Angry Birds Go! in 2014 and they were shown off at the Toy Fair of that same year, but ended up never being sold in stores likely because of the over-saturation of the Angry Birds brand at the time.
Video where said plush toys are displayed: https://www.youtube.com/watch?v=KAoHukxnlLk