You need just two copies to Upgrade level 2 and 3 Animals.
Wonder Waddle is one of the advanced Heroes in Storybook Brawl.
Only needing two copies to Upgrade a Character is a powerful ability, however in the case of Wonder Waddle it’s heavily limited. You need to get a sufficiently powerful selection of low level Characters and Treasures to get ahead of the pack. In particular, you want to get the Easter Egg.
List Of Heroes