Disney Fairies Hidden Treasures

I had to get a lot more than 20 pollen on the screen at once to do this. I clicked the mouse quickly to make small movements and spawn a bunch of pollen in, weaving between them. Then I clicked and dragged in a zig-zag pattern to try to hit many at once. Took a bunch of tries for me to get this.

I struggled with this achievement for quite a while. I used a slightly different method than the one outlined above and just wanted to list it to help others who might have been stuck like me. Essentially, try to weave around as the other solution lists to create as many pollen bits on screen as possible. If a tornado power up appears on screen, take it! This will push pollen away from you and give you the opportunity to create more bits.

I used that tornado power up to actually push all of the pollen on screen into the corners, and then when the power up wore off, I went into the corner and popped all of the bits of pollen, easily surpassing the 20 required for this achievement. Using the tornado power up that occasionally appears on screen made this achievement quite a bit easier.

Hopefully this helps :)