Butterflies need to be levelled up to increase their honeydew harvest. To level up a butterfly, you need to hatch and raise your butterfly, and feed it the required amount of pollen it needs to grow to the next level. Pollen is produced by pollen flowers. Simply tap a butterfly and drag it with your finger through the pollen to collect it! Then you repeat that process until your butterfly is completely levelled up, and then you can make the most of its special ability.le