Questions
Barbie looked up. Falling from the sky was a squashed Bizarro World version of the pretty little airplane that had passed over him seconds before. Twisting orange-red petals of fire hung above it in the air, a flower that was still opening, an American Disaster rose. Smoke billowed from the plummeting plane.

Question 1: In this case, what's the meaning of 'Bizarro World version'?

Question 2: What's the meaning of 'American Disaster rose'?

Question

Questions
Barbie looked up. Falling from the sky was a squashed Bizarro World version of the pretty little airplane that had passed over him seconds before. Twisting orange-red petals of fire hung above it in the air, a flower that was still opening, an American Disaster rose. Smoke billowed from the plummeting plane.

Question 1: In this case, what's the meaning of 'Bizarro World version'?

Question 2: What's the meaning of 'American Disaster rose'?

Answer

Were these word capitalized in the original text?  If so, they are not proper nouns that I recognize.  Capitalizing these words confuses rather than clarifies the meanings.

Bizarro world (slang) - refers to a world in which things are crazy or bizarre.
American disaster rose - refers back to the flower-shaped fire petals of the plane explosion.  "American disaster" refers to the numerous disaster films made in Hollywood during the 1980s and beyond.