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Bowserstein! is a quest in Mario Party Advance that is initiated at Bowser Lab. The name is a portmanteau of "Bowser" and "Frankenstein", referencing Bowser's scientific position in the quest. It starts properly after Bowser and Koopa Kid ask the player if they are challenging them. If they disagree, Bowser and Koopa Kid become disappointed, with Bowser also exclaiming that he memorized the scientific words for no reason, while if they agree, Bowser explains that he built "the ultimate monster" with the hopes of beating the player. He then offers the player a choice between a "scary" monster and a "VERY scary" monster: the very scary monster is actually a Huffin' Puffin, which harmlessly walks by when chosen, leaving Bowser embarrassed and forcing the player to restart the quest; the regular scary monster is actually Naval Piranha, which can be challenged properly to the Koopa Kurl Duel minigame when chosen. When Naval Piranha is beaten, Bowser admits defeat himself and gives the player his Gaddget, Magic Lamp, as a reward.
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