Lava Bubble (blue)
From the Super Mario Wiki, the Mario encyclopedia
The blue variant of the Lava Bubble is an enemy that first appears in Super Mario Galaxy. They resemble Li'l Brrs, but are fiery instead of icy. The only way to defeat them is to shoot Star Bits at them, and they release one coin. Blue Lava Bubbles are first encountered in Good Egg Galaxy during King Kaliente's battle. King Kaliente, after taking a second hit, summons several of them. The blue Lava Bubbles bounce and follow Mario, which can burn him and potentially disrupt his returning coconuts at King Kaliente. King Kaliente also spawns these blue Lava Bubbles during a rematch in King Kaliente's Spicy Return in Bowser Jr.'s Lava Reactor, although these enemies are found in the level prior to the fight. Finally, the blue Lava Bubbles appear in the Melty Molten Galaxy, guarding a Silver Star in Burning Tide and guarding Star Chips in Through the Meteor Storm.
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