Deeno, Dano and Sue are three Deinonychus. They were Max's first creatures.
Their fossils, along with the Center Stone and the Whip Attack, Spinning Attack and Crossing Attack tablets were found near a ninja village resort in Japan. When refracted light from a warrior's swod hit their fossil, they were activated. They first appeared in episode 5, where after a fun-filled chase, were finally claimed by Max. They were then used to attack Tenna and Ryne in episode 6.
Whip Attack - It was first used as a counterattack to Sister's Volcano Burst.
Spinning Attack - This was used to weaken Sister.
Crossing Attack - This was used to finally defeat Sister before she had the chance to attack.