Poffins are essential for your buddy. 

With the buddy update comes the ability to use Poffins, and if you aren’t sure what they are yet, let me bring you up to speed. A Poffin is a brand new ~premium~ item, according to Pokemon GO Hub, and it’s definitely something you’ll want while you’re adventuring alongside your beloved Pokemon buddy.   

Although it’s not necessary to buy Poffins, if you plan to level up multiple Buddies at the same time, it could be useful to have a few in your inventory.

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