To get a Poogle, you can either buy a Magical Poogle Plushie, or a Poogle Morphing Potion. You might also be able to get one from the Create-a-Pet-Center, but I believe there are none left to create at the moment.

After you have a poogle, you would then need to paint it Faerie with a Faerie Paint Brush.

You could do both of these in one step with a Faerie Poogle Morphing Potion, but those cost at least a million neopoints I'd imagine - they are not easy to find.

Good luck!