- "Now you face hot wrath. The hot wrath of my freezing blizzard attack! Here your long journey ends!"
- ― Blizzard Midbus, Mario & Luigi: Bowser's Inside Story & Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey
Blizzard Midbus is the fifteenth boss in Mario & Luigi: Bowser's Inside Story and Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey, and is battled by Bowser. He has been powered up by Fawful's ray gun for his final battle, and has 2041 HP, (2580 HP in the 3DS remake) which is higher than the last four bosses in the game, (five if counting Super Peach's Castle of Fury).
One of his new attacks is throwing snowballs at Bowser from the top screen. This is avoided by Bowser ducking. If (at least) 3 snowballs have been dodged, Blizzard Midbus will get mad and try to punch Bowser. This is countered by Bowser's own punch. Another one of his attacks involves him going off the battlefield and roll at Bowser in a giant snowball. Bowser has to punch the Bob-omb buried inside to counter it. Occasionally, Midbus will spawn four Snawfuls from his crown. The Snawfuls can attack Bowser by throwing snowballs at Bowser while Blizzard Midbus is crawling up a wall. Then he rolls up into a ball and flies at him. This is countered by Bowser punching or ducking. When inhaled by Bowser and left to Mario & Luigi, the Snawful's shovel position indicates which Bro they will hit (lifted up for Mario, kept down for Luigi). Snawfuls restore 30 HP to Blizzard Midbus if they aren't inhaled or defeated quickly. Each Snawful killed by Mario and Luigi fills up a meter. If the meter reaches (at least) five Snawfuls total, Bowser will spit out a cloud of snow that turns into ice and plugs up Blizard Midbus' crown, preventing him from spawning more Snawfuls. Snawfuls killed by Bowser won't fill up the meter. When Midbus loses a lot of health, the Bob-omb Snowball attack will not show the Bob-omb in the snowball. After his defeat, Blizzard Midbus will turn into a block of ice.
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