SaberLeomon

SaberLeomon is a minor hero in Digimon Adventure, and Leomon's Mega form. He resembles a yellow saber-tooth like lion. His known attacks are Howling Crusher and Twin Fang (Infinity Arrow in Digimon Data Squad)

SaberLeomon first appeared when he rescued Mimi, Palmon, Joe, and Gomamon from MetalEtemon. When MetalEtemon showed up, Leomon then Digivolved to SaberLeomon once again to battle MetalEtemon. SaberLeomon took a fatal attack from MetalEtemon when he saved Mimi. With his remaining strength, SaberLeomon killed MetalEtemon by impaling his chest, and reverted back to Leomon before he died.

Trivia

 * SaberLeomon is the Digivolved form of Leomon (despite of skipping the Ultimate Level stage).
 * SaberLeomon is a hero in Digimon Adventure, but in Digimon Data Squad, he is a major villain.