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The Heart Pillars are tall pillars scattered around Flipside and Flopside that are used to house the Pure Hearts in Super Paper Mario. Once the four heroes place a Pure Heart into a Heart Pillar, a new doorway to another dimension becomes available.
There are eight heart pillars in the game, and they are mostly found in the outskirts of Flipside and Flopside (though the game's first Heart Pillar is found on floor three of Flipside, and the fifth is in the equivalent location in Flopside). They also typically require the use of a certain Pixl or the abilities of a certain hero, usually one obtained in the previous chapter, in order to be reached. However, the final Heart Pillar, which can be accessed anytime after entering Flopside, remains invisible until its respective Pure Heart is found, with only its signature heart indentation visible in the air.
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