Your strengthening bond with your partner Pokémon grants you the following benefits.
Ability Score Increase. Increase your partner Pokémon's Intelligence, Wisdom, Charisma, or Constitution by 1, to a maximum of 20.
Superimposed Spellcasting. When taking the Magic Action to cast a Spell, you can choose to have the spell originate from your partner Pokémon, as if you had cast it from their space. This can only be done if your Partner Pokémon is within the original range of the spell being cast, and if the spell requires Concentration, both you and your partner Pokémon taking damage forces a Concentration save using your Constitution saving throw modifier.
Pokémon with the ability “Skill Link” that have a Spellcasting feature are automatically granted the benefits of this Feat.