Sumilidon is a Medabot that resembles a saber-toothed tiger. As such it has its Flexor Sword part, which deals a large amount of damage. The Straw Hammer is great for speed attacks, but it is somehow weaker than its other arm. The Hunter Part allows Sumilidon to set traps to protect itself from shooting attacks.
In the anime
Sumilidon is Koji Karakuchi's Medabot. He is not much of a talker, usually only speaking when spoken to or when it is extremely important. He is a strong contender. He received training from the Space Medafighter X to learn a special ability with its Flexor Sword part, named the Shadow Sword. During the Robattle with the U.S.A. Team, Sumilidon gained the ability to use the Medaforce. This led people to believe his Medal was a Rare Medal, however after the studies Dr. Aki ran, his conclusions were his Medal was a clone medal like the others. Dr. Aki had a theory that Sumilidon might have had some ancestral connections to the Rare Medals giving him the Medaforce but this is just a theory. However, this might have something to do with the fact any Medal can use different Medaforces in the games.
In Medabots (GBA)
Sumilidon has a card in the Medabots Trading Card Game booster set. It attacks with a basic grappling attack.