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 and iOS. 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 plays similarly to other kart racing games, most notably Mario Kart Super Circuit. Each race begins at the starting line, where eight racers are lined up in certain positions. Each of the seven computers are placed in the closest seven positions to the starting line, but the player character always starts a circuit in eighth place. This placement may change in the next race of the circuit depending on how well the racers do. If the player places first, he or she will be in the first position, as the placement in the following races is based on how the racers did in the previous race. The race is seen from behind the player, and uses Mode 7 effects to simulate the three dimensions. A timer will count down to indicate the beginning of the race, and the player must hold down a button to accelerate at the beginning. The player can pick up coins off of the track which may be spent on items in a shop, and depending on the character the player controls, he or she may try to cause another player to spin-out. The player may use other buttons to do such actions as jump and brake, which aides in maneuverability.
Source: Wikipedia, "Konami Krazy Racers", available under the CC-BY-SA License.