Tornado Outbreak

You need to get all 100 fire flyers in a zone without absorbing. The best known area so far to get this is Zone 3 of Carnival Chaos. You will need to hold R1 to hold the fire flyers as you get them. Once you have any you start slowing down moving, if you come to a complete stop you will automatically absorb whatever flyers you were holding, so you need to be quick (you're also going against the timer). You will get a short speed boost every time you hold any additional flyers.

Here is an image of the path you should take in this zone (thanks to hadzuki for posting the image):

Going by this path, you will want to get as big enough as you can going against the plants and fence. When the fence ends turn left heading towards the pool picking up all the stuff you can on the way. When in the pool grab as many people as you can and head up the way the image shows. By the time you are at where the load star is you should be size 6. Now follow the third part of the image making sure you pick up all the yellow glowing areas that are holding fire flyers. One of the hardest parts is being size 11 in enough time to destroy the slides and purple building on the image at the end. Good luck!

Here is a video showing an alternate route to take for the trophy: