Konami Krazy Racers (Konami Wai Wai Racing Advance in Japan; Krazy Kart Racing for mobile) is a kart racing video game published and developed by Konami for the Game Boy Advance handheld video game console, iOS and Android. It was first released in Japan, and was later released in North America and some PAL regions. It was a launch game for the system. Konami Krazy Racers makes use of a variety of characters and concepts from several of Konami's franchises, including Castlevania, Metal Gear, and Gradius. It plays similarly to the Mario Kart series, with eight characters per circuit and offensive/defensive items placed at predetermined points in the tracks. Konami Krazy Racers received mostly positive reviews.