Paper Fire Bro
From the Super Mario Wiki
Paper Fire Bros. are paper forms of Fire Bros. that appear as enemies in Mario & Luigi: Paper Jam. One of their attacks involves two of them standing on either side of one of the Mario Brothers and throwing fireballs at him. Jumping over the fireballs allows him to avoid damage, along with causing damage to the Paper Fire Bro on the other side. This occasionally causes the Paper Fire Bro to catch on fire and run at the bro, forcing him to jump to avoid damage. Paper Fire Bros. can also attack by throwing a fireball into the air and then folding themselves up like a baseball bat. They then point towards one the bros., and hit the fireball towards them when it comes back down. Whenever the fireball is hit with a hammer, the Paper Fire Bro hits it at another bro, eventually getting burned and ending the attack after three hits. Paper Fire Bros. are found during the second visit to the Twinsy Tropics Dungeon.
Rare, shiny variants can also appear in place of the regular Paper Fire Bros. in the same area. These Paper Fire Bros. have greater stats and always drop either a Super Candy or a LV 2 Character Card when defeated, though their methods of attack remain the same.