The tutu-like skirt that Gardevoir had as a Kirlia had became an elegant ballroom gown, with a similar green underside. Its ‘hair’ style has also changed, with ‘curls’ down the sides of its head. Gardevoir has long, slender, white legs underneath the gown. Gardevoir's arms are now green; its arms are connected to the hand with no defined wrist. Gardevoir owns long, slender fingers that are connected to the arms directly, appearing more glove-like. The red fin-like horns it had on its head before evolving have now moved to its chest and its back. Gardevoir also has spikes to the side of its face that has a close resemblance to a masquerade mask. Gardevoir has a band of green extending on its chest to the centermost fin and then connecting to the sleeve-like arms, almost appearing to resemble a Torso or top-like part to a dress.
Gardevoir can sense the feelings of people and other Pokémon. It can also able to see the future clearly. Gardevoir has the psychokinetic power to distort the dimensions and create a small black hole, in order to protect its Trainer. Apparently, Gardevoir does not feel the pull of gravity because it supports itself with psychic power. It also has the power to teleport. In addition to Psychic type moves, Gardevoir can also learn moves of a variety of types, such as Energy Ball, Thunderbolt, Focus Blast, Shadow Ball, and Charge Beam. As a fully evolved Pokémon it can also learn Hyper Beam and Giga Impact.
Gardevoir are known widely for their loyalty to their trainers, even to the point of sacrificing their own life for them. In the wild they go in family groups, caring heavily for their young.