Materials(in the game)
Power Rushes (many as you can find)
Power Bounce (Blue shoe)
First, go down The Pit of 100 Trials (stay at level 99)
Second, Equip all your Power Rushes and your Power Bounce. Feel free to equip your Badges.
Third, Go down the pipe in level 99. You'll meet Bonetail (oldest brother of Hooktail and Gloomtail) and after the scene use your Power Bounce as many times as you can (it'll probably do 70 damage each time you bounce). After 200 damage (probably 3 times or more if you wish.)you've beat him and you can stop. You'll get a treasure of Return Postage (just like Zap Tap but weaker and uses more Badge points which is useless.)
Who is the "Boss"? There are alot of "bosses" in Super Paper Mario
Acutally, it depends which one. Paper Mario: No, thousand year door:yes, new paper Mario:yes
it's been a long time since I beat bonetail but i will tell you something i did i stalked up on syrup jars and ultra shrooms so that when i was out of sp i could keep refilling my sp i just kept using supernova and bobbery's bom-ombast
By getting dottie
you shoot Mario at the moon.
By getting dottie
it is in flopside after you beat world 7
Keep Trying your hardest and eventually you will beat it.
Poosh the "x" buttn
None, none at all.
beat the last boss i recomend vivian or bobbery
beat flipside's pit of 100 trials beat the boss, and ull get dashell