Boosten is a Boo, and a partner in Paper Mario: The Thousand-Year Door 2. He lives at the Creepy Steeple. Originallly, Mario and co. had gone to where the Shadow Sirens were hiding out. In search of Vivian, they entered the Steeple. Boosten, who happened to be hiding in the room at the time, happened to overhear that Vivian couldn't come for some reason. Hearing that the world would be destroyed, he readily joined Mario's party to defend his people and his home.
|Attack||Flower Points Needed||Effect||To Attack||Move Ranks|
|Smack||None||Smacks an enemy up to 4, 5 or 6 times.||Repeatedly tilt the control stick to the left to fill the gauge.||Initial|
|Invisible||2||Makes Mario invulnerable to attacks. Outside of battle, she can use this attack to hide Mario from danger.||Just press A.||Initial|
|Spook||3||Scares enemies away from battlefield half of the time.||Repeatedly tilt the control stick to the left to fill the gauge.||Super Rank|
|Super Scare||5||Scares an enemy 9 times out of 10 away from the field.||Repeatedly tilt the control stick to the left to fill the gauge.||Ultra Rank|
- Boosten's root word is Boo.