Brice asks for a Fire-type pokémon to help him deal with the cold.
The Request
Talk to Brice at Icepeak Camp after you complete the request Setting Up the Icepeak Camp.
Catch a Fire-type Pokémon
Catch a Fire-type pokémon. Some can be found on Firespit Island in the Cobalt Coastlands, for example.
Give the Pokémon to Brice
Give Brice a Fire-type pokémon. You won't be able to get it back.
Reward
You will get 3 Full Restores and 1 Exp. Candy L.