It evolves from Herovor starting at level 16, and evolves into Mountree starting at level 36.
A Forestone resembles a heavily armored tortoise, very similar to its pre-evolution Herovor in color. Forestone have a brown soil shell much like Herovor, but have numerous twigs instead of sprouting leaves. Its shell is a muddy brown, and has numerous grey hills that have sprouted miniature trees. Separating the top of the shell from the bottom is a sandy brown line. Their bellies are a dirty grey color, much like the mounds that have formed on the top of its shell. They are quadruped, with green legs each possessing two claws. On the top of its head is an armored helmet-like cranium, with similar color and decoration to its shell. Its eyes are blue in color.
Forestone have hard shells that allow them to protect themselves from powerful attacks. They have the ability to summon leaves and rocks to attack opponents. They have very hard, powerful heads that are used to perform powerful smashing moves.
Forestone are known to be the "protector" Pokémon, guarding the forest and Pokémon that live inside it from trouble. They are more aggressive than Herovor, but only to intruders.
They mostly live in tall grass in forests where other Forestone, Herovor and a leader Mountree will live.
Forestone supports smaller Pokemon, and helps grow wildlife in its habitat by spreading seeds that grow on its leaves.