The Medal Merchant has some great items that you can buy from him, such as Stat boosts and cosmetics. However, in order to get anything from him, you first need to know where to get Dog Coins in Palworld.
Palworld – How to get DOG COINS fast and where to USE them
There are two ways to find Dog Coins. First, you can find them in the piles of driftwood that are scattered around each island. These piles usually drop two or three awesome items, such as Flamethrower Fuel, Legendary Spheres, etc. You will often get Dog Coins for searching them, and they are pretty much everywhere. Stop and search the piles as you travel around.
The second way to get Dog Coins is by finding Mimogs. These are Neutral Pals that look like crates from a distance. Even up close, you can't see their health bar until you attack them. Mimogs are extremely fast Pals that will run away from you as fast as they can.
Take out Mimogs as soon as possible to avoid having to chase them down. I prefer to kill them rather than capture them, as they aren’t really great in a team or on base. They’re basically just great Pals to farm for materials, as they drop: