Rally Block

From the Super Mario Wiki

Rally Blocks are found in various places in Mario & Luigi: Superstar Saga. They are yellow blocks with a black-and-white digital display on one side. The display starts at zero, but when struck, Mario and Luigi will face each other. One brother hits the block for a coin, the number on the block changes to one, and the Rally Block will slowly move toward the other brother. When possible, he should jump for another coin. The number will change to two and the process repeats. The block will start to accelerate, reaching maximum speed at around twenty-three hits. However, it is possible to strike the block 99 times before it stops automatically. If a brother misses the block, it stops early.

However, once the block is missed or stopped, the Marios can do another session, and then another before the block will stop giving out coins. If they get 99 coins from each session, they will obtain the maximum of 297 coins possible from one Rally Block.

Blocks

! Block | ? Block | ♪ Block | 4-Bros. Random Block | Arrow Block | Aurora Block | Black Block | Bonus Block | Brick Block | Bros. Block | Coin Block | Command Block | Control Block | Dice Block | Dotted Line Block | Drop Block | Egg Block | Event Block | Expansion Block | Giant ? Block | Giant ! Block | Grab Block | Green Block | Heart Block | Hidden Block | Hint Block | Ice Block | L Block | Laser Block | M Block | Marshmallow Block | Metal Block | Minus Block | Mushroom Block | Perry Block | Pink Block | Plus Block | POW Block | Pushing Block | Rally Block | Random Block | Red Block | Rock Block | Save Block | Shine Block | Simu-Block | Spin Block | Star Block | Stone Block | Super Block | Triangular Block | Turning Block | Used Block | Warp Block | Wooden Block | Yellow Block | Yoshi Block