Decorating the pods in Pokémon Brilliant Diamond and Brilliant Pearl can be a feature worth spending hours in if you have the right amount of stickers. Since each customizable Poké Ball can hold up to 20 stickers, you'll eventually find yourself frantically digging around every corner of the map to find out more.
Fortunately, there are over 90 types of stickers and animations to collect and witness for yourself, but you can collect a certain sticker multiple times. Players will get their first batch of stickers from Gym Leaders, each themed after their own Pokémon type. In addition to all the gym battles, fighting the main characters of Team Galaxy should also reward the trainers in stickers and money.
While not available in most Poké Marts, the shop north of Sunyshore City has a shopkeeper who sells the rarest stickers in the game. This character always has a catalog of at least seven stickers to buy from, and his stock changes constantly every 24 hours.
If players have not yet reached this section of the game, they may need to try their luck talking to NPCs inside buildings elsewhere. The larger the building, the more likely an NPC is to be sitting inside waiting for gift stickers along with a Poké Ball or additional consumable.
Related: How to win every Super Contest Show in Pokémon Brilliant Diamond and Brilliant Pearl