Latest Pokemon GO information about Celebi Psychic and Grass pokemon. Pokemon Go Generation 2: Psychic Type Pokemon are countered by Ghost Type. For Example, (Ghost type) will deal increased damage to Celebi when using any Ghost Moves against him in Gym Battles.

Additionaly, since this Pokemon is also a Grass Type.

It will suffer increased damage from Flying Type Pokemon, such as Ho-Oh or if damaged by any Flying Type Moves.

However, it will also take decreased damage when attacked by Fighting, Poison, Water, Ground and Rock moves.