Answer:
I am the kind of soda you must not drink.
I fly when I'm on and float coming off.
At night I come without being fetched, and by day I am lost without being stolen. What am I?
I am an odd number. Take away a letter and I become even. What number am I?
I am a tale in childrens' minds. Though an illusion, I occur every night. I give them a fantasy, I give them a fright. What am I?
I am a rock group with four members. All dead one was assassinated.