From the Super Mario Wiki, the Mario encyclopedia
Paper Bob-ombs are paper forms of Bob-ombs that appear as enemies in Mario & Luigi: Paper Jam. Paper Bob-ombs are commonly found at Doop Doop Dunes, with higher level Paper Bob-ombs found at Sunbeam Plains and during the mission Final Smash in Neo Bowser Castle. Paper Bob-ombs are among the few enemies in the game whose regular counterparts cannot be fought normally; King Bob-omb does use regular Bob-ombs as projectiles.
Rare, shiny variants can also appear in place of the regular Paper Bob-ombs, and have higher stats like all shiny paper enemies. The Shiny Paper Bob-ombs at Doop Doop Dunes will always drop a Mushroom and a Double 1-Up Mushroom; the ones at Sunbeam Plains and Neo Bowser Castle always drop a Super Mushroom and a Shiny Battle Card when defeated.
Paper Bob-ombs have simple attack patterns, ramming into the Mario Bros. in order to damage them. The Mario Bros. must jump over them, jumping on them will cause them to explode. After attacking a Paper Bob-omb, its fuse will light, and its next attack will result in an explosion which will defeat the Paper Bob-omb and may leave its target Dizzy, although the Paper Bob-omb can be hammered into another enemy.
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