Turtle-like Time Shifter that can trap anyone in his shell. Raldo-Con can shoot crystal spikes from his shell and can turn into a large rolling ball of crystal spikes. Raldo can also transform into Raldo-Master which can freeze any enemy with his Raldo Freeze. He was found in the time of Petra Fina's childhood.    from wikipedia

It is the 25th century. The dark lord has 'infected' history with time-devices that could damage history beyond repair. Flint and his father lived in the prehistorics when they got turned into fossils. They are discovered and Flint gets turned back to his original state. With the help of his father, a boy Tony and a girl Sara he has to travel through time to bring the time-devices back to the land of time so history will be saved.
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(Source: Anime News Network)

Rarudo