Battle Boat is the eighth mission in Mario Tennis Aces, taking place in the Bay Ferry.
Mario and Toad reach the sea behind Mirage Mansion and Snowfall Mountain but can't pass it. Then, they notice an airship, and ask the Koopa Troopa who owns it to bring them to the other side. The Koopa Troopa tells them he has finished ferrying people for the day, but after Toad tells him that they are in a big rush, the Koopa Troopa agrees to ferry them if they beat him in a tennis match. Mario must then beat him in a 3-sets match.
After beating him, the airship can move to Mirage Mansion and Snowfall Mountain.
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