Smoldergeist

Smoldergeist are floating, glowing orbs, that the bros encounter and fight, while in the cave behind Pi'illo Castle. They have lived in the cave for a long time.

History
Mario and Luigi entered the cave behind Pi'illo Castle to rescue Princess Peach and Todsworth. There the bros where confronted by Smoldergeist a spirit who has long guarded the cave. The bros were forced to battle a Gromba and after beating it went to the next room. In this room Smoldergeist inhabiting different torches provided the bros with two challenges. The first was to jump over some gaps and a second one to hit some blocks in the right order to unlock the passage ahead. After continuing to through the cave the bros had to complete one final challenge where they were shown 6 purple block with similar designs and had to hit the odd one out.

The bros eventually found Peach and Toadsworth surrounded by 4 Smoldergeist, but they fled after being confronted. The Bros picked up a pillow lying on a throne. Mario and Luigi were suddenly surrounded by the 4 Smoldergeist, which they fought. After defeating the Smoldergeist the gang then left the cave, ending up in the collection room.

Physical Appearance
Each Smoldergeist is a floating dark purple sphere, with two large eyes. Their body is surrounded with a pink flame.

Abilities
Smoldergeist can float above the ground, using their pink flame and inhabit the torches found through the cave behind Pi'illo Castle. They can also turn invisible. Their flame is hot and will hurt any one who touches it.