Reference article
Talk to the Solitary Trainer
Open the gate at Cosy Cove and learn either Swimming or Flying from Minty Snowball.
In-game objective
The path to Duck City is blocked! You won't be able to get there unless you learn to fly or swim. There are rumors of a solitary trainer nearby who should be able to teach you
Open the gate
Reach 
Cosy Cove and complete 
Locked Gate to collect the key halves for the locked gate.
Choose a travel skill
Speak to 
Minty Snowball inside. Choose Swimming or Flying and learn it. The game tracks learning the chosen skill; the other skill is available later on the opposite regional route.
Where this happens
These area pages cover the destination or a route used by this objective. Choice-dependent stops only apply to the chosen route.
Across the games
Compare games and editions on the 
Duck Life 8: Adventure page.