Badges

Badges are equippable items in Paper Mario and Paper Mario TTYD. They cost a certian amount of BP (badge points). Each badge does something to help you along your adventure.

Summary
Most badges help you but some do not. Like the L and W emblem. They just change your appearance. Some help you outside of battle like the first/bump attack which depending on your level. Some make sounds outside of battle like the attack fx badges in TTYD.