Watermelon Whalin' (Watermelon Whacking in the British English version) is a 1 vs. 2 or 3 minigame appearing in Mario Party 10. This minigame appears to be based on a traditional Japanese game, suikawari.
The players are at a beach, with the solo player holding a hammer and the rivals holding one watermelon each. The objective of the solo player is to whack the watermelons the rivals are holding. If the solo player manages to whack all of the watermelons, they win. If at least one rival holds their watermelon for the entire 30 seconds, the rivals win.
Rivals that lose their watermelons can still move to try and block the solo player from knocking out any other rival with a watermelon.
Solo (1 player)
Rivals (2 or 3 players)
"Solo Player: Hit the watermelons with ! - Rivals: Run away!"
Names in other languages