How to get two more Bros attacks
When you get your hammers forged by the two hammerbros and get the super hammers, go down to the bottom right hand corner. You will see rocks destroy them until you see a door. Go in and there should be a rock guy. Talk to him. He will say give him 200 coins and chose a rock. under one is nothing, under another is 300 coins, and under another is a new bros. attack(They constantly switch so i don't know which one its under.) Then when you get ultra hammers go back to the one corner and destroy the black rocks until you get to the other door. When you go the time the rock will ask for 500 coins. Now under one rock is nothing, under another is 800 coins, and another is a new bros. attack (yet again they constantly switch so i don't know which one its under.)And presto you now have two new bros. attacks.