Vs. Seeker Items are a group of items that can be used in the Vs. Seeker. By selecting one from the user's inventory when a Pokémon is selected, the Vs. Seeker Item will be consumed and its properties used when running the Vs. Seeker battle. Specifically, with one exception, a Vs. Seeker Item will add the offensive advantages of its type to the Pokémon while ignoring any offensive disadvantages. For example, equipping a Blastoise with a Charcoal would grant it the Fire-type's advantages over Grass, Steel, and Ice, while still allowing it to hit Rock-type Pokémon as normal. Each type has one item associated with it; for the most part, these are the same items that, in the video games, provide a boost in the damage done by moves of that type when held by a Pokémon.
Every day, four Vs. Seeker Items will be rotated through the Shop at 6 AM and 6 PM EST. Vs. Seeker Items can also be awarded by completing certain Achievements, in the Underground, and when hatching a Pokémon egg. In the latter case, the item that is produced will be of (one of) the type(s) of the Pokémon hatched; for example, a Squirtle Clone can hatch with either a Mystic Water or a Blackglasses.