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The Splash Bros. is a Bros. Attack in Mario & Luigi: Superstar Saga. It is one of the first two Bros. Attacks learned, the other being the Bounce Bros.. It is learned at the Stardust Fields and was used in the tutorial on how to use Bros. Attacks. The move can be activated during Mario's turn. It costs 4 Bros. Points in Mode 1 and Mode 2, but costs 3 BP in Mode 3.
It takes 20 uses of the Splash Bros. before they can learn the Advanced Command. In the advanced command, Mario attacks the enemy solo, spinning into it. This can damage spiked foes without harm.