Exp Share

Exp Share is an Pet item which is used to split Pet XP between pets. It is crafted with the Exp Share Core.

Usage
While the pet is unequipped, this pet gains of the equipped pet's xp gain, this is split between all pets holding the item.

The Exp Share does not split pet XP between the summoned pet and the pet with the Exp Share equipped. The pet that is currently summoned will still gain 100% of the pet XP it is supposed to get.

The Exp Share can also be used as a +25% All skills exp boost. If you have no other pets holding an Exp Share other than your currently equipped pet, the 25% extra pet xp will also go to your equipped pet.

Example
The player currently has a combat pet equipped (pet A) and a fishing pet (pet B) has the Exp Share.

The combat pet will get 100% of the XP from combat; on the other hand, the fishing pet (or any other type) will get only 25% of the combat XP because of the mismatched XP penalty. After the penalty applies, 25% of that XP because of the Exp Share is then given to the fishing pet.

Using the above example, pet A gains 100 combat XP from a mob. Since pet B has the Exp Share, 25 combat XP will be shared among all pets that have the Exp Share (we assume pet B is the only pet to have it in this case). However, since pet B is not a combat pet, the XP penalty applies; thus, 6.25 XP (25% of the remaining) is given to pet B.

Trivia

 * This could be a reference to the Pokémon item called the Exp. Share, which does the exact same thing as this. It might also be a reference to the Pokémon card Exp. Share which allows you to move energy cards when a Pokémon is knocked out.