Golems are the result of Graveler's hidden gene. They are quite rare, as they are very hard to train and control; most inexperienced trainers release them causing trouble for local farmers, raiding their farms and even destroying buildings.
They have a nasty temper but if you are an experienced rock trainer you should know how to control them.
They are extremely strong but quite dim, making them exceptionally dangerous.
They have the ability to pull their limbs in close to their body and roll at high speeds. This ability alone makes them a powerful ally in battle.
Their shell (made of sand and gravel 'see graveller' can move and change shape, this allows the shell to be more flexable when in battle. When rolling the shell can almost make a perfect sphere, but when not in battle it makes a slight egg shape, to allow it to walk on two legs.

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