From the Super Mario Wiki
Luiginary Flame is the fourth available Luiginary Attack in Mario & Luigi: Dream Team. The Attack Pieces for it are located in Dreamy Driftwood Shore, and it costs 14 BP to use. Before the attack begins, Dreamy Luigi poses atop Mario as if he was throwing a fireball.
When the attack begins, Mario heads away from the enemies, and spawns Fire Luiginoids out of Dreamy Luigi, one hurling a fireball at Mario who catches it and passes it on when the player presses the button. During the attack, the player must press the and buttons as the fireball reaches Mario and Fire Luiginoids respectively to make them pass the fireball towards the enemies. Eventually at the end of the sequence, the fireball will be passed towards Mario who must smash the fireball at the enemies with the player's timely press of the button, the fire damaging most of the enemies if successful. The less mistakes made during this attack, the better rating the player will obtain, ranging from "OK!" to "Excellent!" ratings. Failure to correctly strike the fireball into the enemies at the end will result in the player getting no rating whatsoever.
This attack's damage is given Fire attributes, and thus deals critical damage to Dreamcaps, Dreamcap Captains, Cocoknights, Iceads, Piranha Plants, Dreamcaps R, Dreamcap Captains R, Cocoknights R and Spritzblooms.
The fire will bounce at a steady pace. Press the B Button to make it bigger! Mario will cover the spots where the Luiginoids aren't. Use the A Button here. Press the A Button once to make Mario hammer the flame at the foes!
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