Reference article
Evolution
League progression changes each specialised duck’s form.
The four paths
Retro Pack uses these on-screen evolution names. Original Flash calls the athletic final form Athletic Duck and the swimming final form Merduck-Fish.
Specialisations
In Flash and
Retro Pack, each duck type applies these multipliers to its trained racing skills.
| Duck type | Running | Swimming | Climbing | Flying |
|---|---|---|---|---|
Strength Duck | 1.00× | 1.00× | 1.50× | 0.90× |
Athletic Duck | 1.25× | 1.25× | 0.90× | 0.90× |
Flying Duck | 0.90× | 1.00× | 0.90× | 1.50× |
Swimming Duck | 0.90× | 1.50× | 0.90× | 1.00× |
Display grades and actual mechanics
The selection screen uses letter grades. The bonuses vary by skill: Athletic running and swimming use 1.25×, while Strength climbing uses 1.50×.
Returning to earlier leagues
The game explains that revisiting an earlier league restores the form associated with that league.
Final transformation
After the Professional finals, the
Portal leads to the
Supreme Duck form and the champion race. The champion race uses the four trained skill values without the usual type multipliers.




