Oricorio's form change is a rather simple one. Its form is mostly just dependant upon which island of the Alola Region it is caught on. This affects its type, as well as the type of its move Revelation Dance. However, these forms can be changed by using the special Nectar items that are found in each island. Simply give Oricorio the nectar and its form will change.

Pom-Pom Style	Baile Style	P'au Style	Sensu Style Form
Melemele Island Yellow Nectar	Ula'ula Island Red Nectar	Akala Island Pink Nectar	Poni Island Purple Nectar

This form is a rather unique form in that it cannot be changed under any circumstance. Lycanroc's form is dependant upon what game you are playing on when you evolve your Rockruff. If you're playing on Sun, it'll be in the Midday Form and if you're playing on Moon, it'll be in the Midnight Form. Each form has a different learnset, stat spread and abilities.

Midday Form	Midnight Form
Base Stats HP: 75 Attack: 115 Defense: 65 Sp. Attack: 55 Sp. Defense: 65 Speed: 112	Base Stats HP: 85 Attack: 115 Defense: 75 Sp. Attack: 55 Sp. Defense: 75 Speed: 82

Despite this, these Pokémon aren't version exclusive. You can find the other form in the wild during the corresponding time of day in Vast Poni Canyon.

Wishiwashi is one of the more unique Pokémon in Sun & Moon. This Pokémon as standard has the lowest Base Stat total in the game but its ability, Schooling allows for it to change form. When it is over Level 20 and has over 25% of health, it will change form into its massive and powerful School Form. If its health drops below 25%, it changes form back to Solo Form. If its health goes back to over 25% then it will go back to School Form

Solo Form	School Form
Base Stats HP: 45 Attack: 20 Defense: 20 Sp. Attack: 25 Sp. Defense: 25 Speed: 40	Base Stats HP: 45 Attack: 140 Defense: 130 Sp. Attack: 140 Sp. Defense: 135 Speed: 30

Silvally is a unique Pokémon that was created to defeat the Ultra Beasts. As it is based on Arceus, it has the unique RKS System ability which changes its type, as well as the type of its move Multi-Attack. This is done by attaching the unique Memory items.

Type: Normal	Type: Bug	Type: Dark	Type: Dragon	Type: Electric	Type: Fairy
No Item	Bug Memory	Dark Memory	Dragon Memory	Electric Memory	Fairy Memory
Type: Fighting	Type: Fire	Type: Flying	Type: Ghost	Type: Grass	Type: Ground
Fighting Memory	Fire Memory	Flying Memory	Ghost Memory	Grass Memory	Ground Memory
Type: Ice	Type: Poison	Type: Psychic	Type: Rock	Type: Steel	Type: Water
Ice Memory	Poison Memory	Psychic Memory	Rock Memory	Steel Memory	Water Memory

Minior is another Pokémon with a form change based on Hit Points. When sent into battle, Minior will bring its shell up over itself which protects it from status conditions, but when its Hit Points drop below 50%, its Shields Down ability is activated and it switches to its Core Form. This switches the Defense and Attack base stats, and also doubles its Speed. Its capture rate while in Core form is also much higher than when it is protected

Meteorite Form	Core
Base Stats HP: 60 Attack: 60 Defense: 100 Sp. Attack: 60 Sp. Defense: 100 Speed: 60	Base Stats HP: 60 Attack: 100 Defense: 60 Sp. Attack: 100 Sp. Defense: 60 Speed: 120

There are also multiple colours for each form. This is decided randomly when you capture the core and cannot be changed.

Blue Core	Green Core	Indigo Core	Orange Core	Red Core	Violet Core	Yellow Core

Greninja also has a brand new form, one that ties in with the Pokémon anime. Using the demo, you can obtain a special Greninja with the Battle Bond ability. When Greninja manages to defeat an enemy in battle, the ability will activate and turn Greninja into Ash-Greninja for the rest of the match. It cannot be bred.

Greninja	Ash-Greninja
Base Stats HP: 72 Attack: 95 Defense: 67 Sp. Attack: 103 Sp. Defense: 71 Speed: 122	Base Stats HP: 72 Attack: 145 Defense: 67 Sp. Attack: 153 Sp. Defense: 71 Speed: 132

Zygarde has a rather unique form change. First, you need to collect Zygarde Cells & Cores from around the Alola Region. When you have collected 10 or 50 of them, go to the building in Route 16 where you can assemble a Zygarde. You'll assemble them based on the amount of cells you have collected. This is where you need to change the form.

If you have collected all 100 Cells & Cores, you can then create a special Zygarde with the Power Construct ability. This Zygarde cannot be separated and has its form changed between 10 and 50% Formes using the Zygarde Cube item. When these form's health drops below 50%, they will change form into the powerful Complete Forme for the duration of the battle..

10% Forme	50% Forme	Complete Forme
Base Stats HP: 54 Attack: 100 Defense: 71 Sp. Attack: 61 Sp. Defense: 85 Speed: 115	Base Stats HP: 108 Attack: 100 Defense: 121 Sp. Attack: 81 Sp. Defense: 95 Speed: 95	Base Stats HP: 216 Attack: 100 Defense: 121 Sp. Attack: 91 Sp. Defense: 95 Speed: 85

Location: Hokulani Observatory

Deoxys was introduced in Pokémon Ruby & Sapphire and given forms soon afterwards. To change the form, you need to interact with a special meteorite. In Sun & Moon, this meteorite can be found inside Hokulani Observatory, next to Sophocles. Just take Deoxys there and you'll be given the option to change form.

Location: Route 1

Rotom has got multiple different forms, all of which have Rotom possess some appliances. To get these applicances in Pokémon Sun & Moon, you need to go to Professor Kukui's Laboratory in Route 1 and go to the basement. Interact with the pile of boxes with Rotom in your party and you'll be able to change form.

Location: Hau'oli City

Shaymin gained its Sky Forme in Pokémon Platinum and to change the form, you need to use the Gracidea flower. In Hau'oli City Mall, there's a shop also called the Gracidea, based on Shaymin and when you speak to the receptionist there, she will give you a Gracidea as a thank you for coming to the store

Location: Malie City

Furfrou is a Pokémon with many different trims. These trims give it a special look that reverts when it goes back in the box. To get your Furfrou trimmed, go to the Salon in Malie City and talk to the punk girl

Location: Aether Paradise

After defeating the Aether Foundation, when you return to Secret Lab A, speak to the employee in the lab and she will give you a few items. These items will help in the changing of various forms

• Prison Bottle - Changes Hoopa's form
• DNA Splicers - Change Kyurem's form