Allie Mega Ducks are a variant of Mystery Ducks which appear in Mystery Duck Challenges.
- Allie Mega Ducks are found in some Mystery Duck challenges. A new Mystery Duck challenge appears every 24 hours, but a different type of Mystery Duck will likely feature.
- When a player collects an Allie Mega Duck and completes the challenge, it is added to the Mystery Duck counter (An Allie Mega Duck counts as one Mystery Duck). For every three Mystery Ducks collected, a new Duckie costume is unlocked.
- Allie Mega Ducks require twenty drops of Steam to fill and collect. All other Fluids, except Water will kill Allie Mega Ducks. If the Allie Mega Duck is killed or if the level is completed without it being collected, the level fails.
- Once all Duckies that are unlocked with the Mystery Duck are unlocked, Mystery Duck challenges will no longer appear, thus, neither will the Allie Mega Duck.
- While Full, the Allie Mega Duck takes on the appearance of a full Allie Duck albeit much larger, though with a smaller head, wings, hair style and eyes compared to its body.
- While Empty, the Allie Mega Duck has the shape and features as her full version, though in shades of pink.