In what instances do Pokemon lose or gain types?

I know we have Forest’s Curse (adds Grass-type), Trick-or-Treat (adds Ghost-type), Burn Up (removes Fire-type), and some evolutions (including Mega-Evolutions) [Mega Aggron for example]. But, is there anything else that adds or removes types on Pokemon?

Pleaselog inorregisterto add a comment.

I only included moves, Abilities, and form changes/Mega Evolutions in this answer. Evolutions don’t count, in my mind, but if you want me to include them just tell me and I’ll try and find a list somewhere. Also, please tell me if I missed something!

Forest’s Curse:Adds Grass-type to the target.Trick-or-Treat:Adds Ghost-type to the target.Soak:The target loses their typing and gains the Water-type.Burn Up:Removes Fire-type from the user.Roost:Removes Flying-type from the user for one turn.Conversion:Changes the user’s type to the type of the move in its first moveslot.Conversion2:Changes the user’s type to a type that resists or is immune to the target’s previous attack.Colour Change:User loses previous type and gains the type of the move used by the opponent.Camouflage:User loses previous type and gains the type of the environment.Protean:User loses previous type and gains the type of the move it’s about to use.

Mega Charizard Xloses the Flying-type and gains the Dragon-type.Mega Pinsirgains the Flying-type.Mega Gyaradosloses the Flying-type and gains the Dark-type.Mega Mewtwo Xgains the Fighting-type.Mega Aggronloses the Rock-type.Mega Sceptilegains the Dragon-type.Mega Altarialoses the Flying-type and gains the Fairy-type.Pimal Groudongains the Fire-type.Mega Lopunnygains the Fighting-type.Mega Audinogains the Fairy-type.

Castformloses the Normal-type and gains the Fire-type in Harsh Sunlight, the Water-type in Rain, or the Ice-type in Hail.Rotomloses the Ghost-type and gains the Water-type in Wash form, the Fire-type in Heat form, the Flying type in Fan form, the Ice-type in Frost form and the Grass-type in Mow form.Shaymingains the Flying-type in Sky Forme.Arceusloses the Normal-type and gains the type of the plate it holds.Darmanitangains the Psychic-type in Zen Mode.Meloettaloses the Psychic-type and gains the Fighting-type in Pirouette form, when it uses Relic Song.Hoopaloses the Ghost-type and gains the Dark-type in Unbound form.Oricorioloses its primary type and gains the Fire-type, Electric-type, Ghost-type or Psychic-type depending on what nectar is used.Silvallyloses the Normal-type and gains the type of the Memory disc that it holds.

Here are all the things you did not mention.

Moves:

Roost:If you are a flying type, you will no longer be one after using it.

Reflect Type:Becomes the same type as your opponent.

Soak:Changes opponents type into a water type.

Camouflage:Changes your type according to the environment.

Conversion:Randomly changes your type to one of your moves.

Conversion 2:You become a type that is “Resistant” to the attack you last received.Ex.You get hit by a flying type move, you will change into a type that flying is not effective against like Rock or Steel.

Abilities:

Multi-type and RKS System:Changes your type depending on the item(plates). Only Arceus and Silvally know it.Ex.If you have a Flame plate, you will become a fire type.I think that’s all. I hope this helps!