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Box Boys are rare haunted chests found in Bean Valley in Super Mario RPG: Legend of the Seven Stars. Box Boys resemble pudgy ghosts hiding in Treasure Chests. When the chest is closed, Box Boy looks like a regular Treasure Box; this mimicry allows him to prey easily on carefree travelers and adventurers searching for valuable items. If Mario hits a Box Boy from below, he has to engage a battle against this enemy. It can also be encountered if the player has fought it already and every symbol in a "roulette" treasure box is different. In battle, Box Boy appears to be a tough opponent: he has high attack, high defense as well as high HP. He also seems to remain unaffected by status ailment-inducing attacks. The best way to defeat Box Boy is to make good use of his only weakness (i.e. Jump) and resort to Mario's Super Jump or Ultra Jump.
Box Boy masters several special attacks, such as Scream, that cuts a party member's attack and defense in half. The chest ghost also uses the attack Carni-Kiss, a powerful bite causing significant damage. Moreover, Box Boy often summons Fautso, another powerful enemy. Fortunately, Mario and his party get 150 coins and 100 Experience Points for defeating Box Boy. Box Boy looks like Chester, Hidon and Pandorite.
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