Paper

From the Super Mario Wiki

The Paper is a item that the player receives from Watchitt in the Piccolo sidequest in Super Paper Mario, and it is used to bring an autograph from Merlumina to him. After the player gives him the autograph he will give the player the You-Know-What, which needs to be given to Bestovius.

Super Paper Mario Items
Attack Items	Bone-In Cut • Fire Burst • Ghost Shroom • Ice Storm • Mighty Tonic • Pow Block • Shell Shock • Shooting Star • Thunder Rage • Volt Shroom
Defense Items	Block Block • Courage Shell • Turtley Leaf
Recovery Items	Big Egg • Black Apple • Blue Apple • Cake Mix • Dayzee Tear • Dried Shroom • Fresh Pasta Bunch • Fresh Veggie • Golden Leaf • Honey Jar • Horsetail • Hot Sauce • Inky Sauce • Keel Mango • Life Shroom • Long-Last Shake • Mild Cocoa Bean • Mushroom • Peachy Peach • Pink Apple • Power Steak • Primordial Fruit • Red Apple • Sap Soup • Shroom Shake • Slimy Shroom • Smelly Herb • Super Shroom • Super Shroom Shake • Ultra Shroom • Ultra Shroom Shake • Whacka's Bump • Yellow Apple
Other	Catch Card • Catch Card SP • Gold Bar • Gold Bar x3 • Gold Medal • HP Plus • Mega Star • Mystery Box • Pal Pill • Poison Shroom • Power Plus • Sleepy Sheep • Slow Flower • Speed Flower • Star Medal • Stop Watch
Important Items	Ancient Clue • Autograph • Card Key • Cooking Disk • Crystal Ball • Diet Book • Floro Sprout • Elemental Tablets • Golden Card • Goldfish Bowl • Helmet • Keys • Orbs • Paper • Return Pipe • Training Machine •You-Know-What