99 Block

The 99 Block is a special block in Mario & Luigi: Bowser's Inside Story. It can be accessed traveling to the Challenge Node in Bowser's body. The 99 Block can be used after Mario and Luigi gain access to Toad Town. The initial appearance of the 99 Block resembles a regular ? Block, but it will turn into a M Block or a L Block after it is activated. Once the block was activated, the Mario bros. had to take turns hitting it. Each hit caused the block to speed up. If the block is hit 99 times, the coins in possession of Mario bros. and Bowser would be doubled. The entire process can be repeated infinitely. If the Mario bros. didn't get 99 hits, a nearby Emoglobin would record the highest score.