When battling in practice or duel mode in the Grassland, you will notice two large boulders placed on opposite ends of the arena. Push your opponent towards them and get very close to the boulders. Do a combo move that ends with a power strike facing towards the boulder. You can also hold Forward and hold R1 for a few seconds to charge up a hit, then release, causing a power punch. This will cause the enemy to go flying into the boulder. You may have to move around to find the correct point to send them flying into. You will see a short intermission with the bolder breaking off of the mountain and falling on top of them. You can also do this to the other boulder on the opposite side of the arena. This will also give a smaller battling range once the boulder is removed. To do this again, just return to the arena. Note: This bolder does 500 damage to the opponent. Also, if you look closely at the mountain, you will notice there is a cracked portion. Slam them in the middle of the cracked portion and it should break off, doing 500 damage and falling on them.