A Bros. Block is a type of block appearing in Mario & Luigi: Superstar Saga. If it is hit, it will give out a coin and move in the direction of the arrow. After a short amount of time, it will turn brown and won't give out any more coins. To get the most coins, Mario and Luigi must alternate Jumping. They are found on the Koopa Cruiser and throughout the Beanbean Kingdom.
A prototype is found in the Block research area of the Woohoo Hooniversity that gives off no coins.