Konami

Konami is a third-party company that has made two Mario games: Mario Roulette and Dance Dance Revolution: Mario Mix. Konami also created the Metal Gear series, which features Solid Snake as the main character and occasionally has Mario and/or Yoshi appear in cameos. Snake appears as a playable character in Super Smash Bros. Brawl. They recently purchased Hudson Soft, which formerly produced the Mario Party series for Nintendo.