Cowboy Kid is a video game for the NES platform released in January 1992. In 1991, it was released in Japan as Western Kids (ウエスタンキッズ, Uesutan Kizzu). It was published by Romstar. It is inspired by Konami's Ganbare Goemon series.
Source: Wikipedia, "Cowboy Kid", available under the CC-BY-SA License.