Paper Shy Guy
From the Super Mario Wiki
Paper Shy Guys are paper forms of Shy Guys that appear as enemies in Mario & Luigi: Paper Jam, encountered in Mount Brrr and Neo Bowser Castle. If both versions of Shy Guys are encountered in battle, the regular version will toss their Paper variant as a form of attack. They may also end up tossing Mushrooms at the heroes instead, healing 50 HP if they are collected. In Neo Bowser Castle, Paper Shy Guy may wield Paper Chain Chomps to use as an attack as well.
Rare, shiny variants can also appear in place of the regular Paper Shy Guys in the same areas. These Shy Guys have greater stats and will always drop a Shiny Battle Card and 1-Up Mushroom when defeated, though their methods of attack remain the same. Stronger versions of a shiny Paper Shy Guy can also appear alongside Shiny RoboBowser during the battle, which have even greater stats and may drop a Max Syrup Jar upon defeat.