Stone Soldier enemy line

Stone Soldier, Boulder Beast, and Raging Rock are species of monsters found in Golden Sun and Golden Sun: The Lost Age. These monsters, resembling a spike ball with eyes and feet, are palette swaps of each other and have differing levels of power and defense. All are associated with the Mars element, because of their resistance and explosive attacks.

Stone Soldier
A blue member. Stone Soldier has 179 HP, 6 PP, 241 Attack, 105 Defense, 104 Agility, and 5 Luck. Its resistances are very lopsided, it has high resistance to the Mars element, but weak against everything else, especially Mercury.

Stone Soldier have a few attacks. They include the psynergies Blast, Mad Blast and the monster skills Headbutt and Dynamite (a high power suicide attack). Stone Soldier could be one of the dumbest monsters in the game as they typically attempt to cast a psynergy, even if they don't have enough PP, thus wasting their turn.

Felling a Stone Soldier yields 98 EXP and Gold, and in uncommon cases, an Elixer. In Golden Sun, Stone Soldiers are battled in the Suhalla Desert and on Crossbone Isle alongside Lizard King. In the Lost Age, they are located inside Tundaria Tower.

Boulder Beast
A pink member only found in Golden Sun. The Boulder Beast has 211 HP, 14 PP, 327 Attack, 137 Defense, 140 Agility, and 6 Luck. While it's resistances are a bit better than Stone Soldier, they're still lopsided, with high Mars resistance, but low Mercury resistance.

Boulder Beast has the same ablilities as Stone Soldier and like it's counterpart, it's not too bright in terms of it's psynergy usage.

Felling a Boulder Beast yields 278 EXP, 164 Gold, and in relatively uncommon cases, a Water of Life. They are located in the second half of Venus Lighthouse.

Raging Rock
A brown member with purple feet found only in The Lost Age. Raging Rock has 186 HP, 48 PP, 294 Attack, 90 Defense, 121 Agility, and 18 Luck. Again, its resistances have improved, but are still lopsided, with high Mars resistance, but low Mercury resistance.

Raging Rock has different attacks than its counterparts. It knows the monster skills Mad Dash, Rabid Fang and Fire Breath. It has the psynergies Flare Storm, Guard, Impair and Bind. However, it can't use many of these due to its low PP and like its counterparts, it doesn't know how to use them.

Killing a Raging Rock gives you 465 EXP, 800 gold and in relatively uncommon cases, a Potion. It is only found on Magma Rock.