Midori no Makibao (GB)

Summary
みどりのマキバオー (Midori no Makibao, Midori no Makibaou or Midori no Makibaō; eng. "Green Meadow King) is a Japanes manga and anime series that spawned several games.

It's titular protagonist, is a horse that is barely bigger than a dog and resembles a hippo, but nonetheless very successfully competes in horse racing. His best friend/jockey is a mouse called Chuubei (チュウ兵衛) and his biggest rival is the stallion Cascade (カスケード).

Game Design
Art style similar to the anime.

Gameplay
GB: Despite not looking like a typical racehorse (or horse at all), Makibao wants to become a star in horse racing. The story is told in comic/manga-like pictures and dialog scenes between Makibao and other characters (jockeys, racehorses and so on). His trainer (?) and breeder (?) comment on his performance in races and training. The player controls Makibao during races. A is for the whip (limited), B activates the chosen power up. Power up cards are awarded for winning and can be collected in training sessions beween races. During training, Makibao likes to snack on apples. Depending on the course, this can be good or bad.

PS1: The game consists of races and story portions, where the player has to make choices. There are 3 different endings.

Differences between Releases
There might also be an Arcade version of the game