Double Pain

Double Pain is a badge that appears only in Paper Mario: The Thousand-Year Door.

It is only obtainable around chapter 2. A man by the name of Charlieton will sell this badge to Mario for a small price of 36 coins. Charlieton also sells other items throughout the game as well, so happening by him early on can get this badge sooner. Double Pain is a very unique badge that lowers Mario's defense capabilities. This badge makes all enemies that Mario, not his partners, face do double damage. This badge only works on Mario. This badge costs only 0 BP to wear too.

Strategy
You may be thinking, "What in the world is this badge used for?!!" This badge is actually one of the key componants to a couple of badge set ups. One of these is equipping this badge and Return Postage. Mario will take double damage, but his enemies that directly attack will take half of the damage inflicted to Mario to themselves as well. Equipping Zap Tap can make it so one extra point is also dealed to them. To prevent loss of life, Mario can easily, as there is actually an unlimited amount of them, equip many HP Plus badges.

Double Pain can also be used, though for fans who want a challenge, to make Mario much weaker. Equipping "terrible" badges and weakening Mario's abilities can make any fight much harder. Double Pain is one of these many badges and it is quite obvious why.