USUM expands the Alola Pokedex over Sun and Moon. More Pokemon are available earlier, new Ultra Beasts join the roster, and Ultra Warp Ride opens up legendaries from every past generation. The late game is harder too. Ultra Necrozma will sweep your team if you're not ready. Same Trial system, bigger Pokedex.

A
Volcanion
#0721

Volcanion

firewater
D
Rowlet
#0722

Rowlet

grassflying
D
Dartrix
#0723

Dartrix

grassflying
C
Decidueye
#0724

Decidueye

grassghost
D
Litten
#0725

Litten

fire
C
Torracat
#0726

Torracat

fire
A
Incineroar
#0727

Incineroar

firedark
D
Popplio
#0728

Popplio

water
D
Brionne
#0729

Brionne

water
A
Primarina
#0730

Primarina

waterfairy
D
Pikipek
#0731

Pikipek

normalflying
C
Trumbeak
#0732

Trumbeak

normalflying
C
Toucannon
#0733

Toucannon

normalflying
D
Yungoos
#0734

Yungoos

normal
C
Gumshoos
#0735

Gumshoos

normal
D
Grubbin
#0736

Grubbin

bug
D
Charjabug
#0737

Charjabug

bugelectric
C
Vikavolt
#0738

Vikavolt

bugelectric
D
Crabrawler
#0739

Crabrawler

fighting
C
Crabominable
#0740

Crabominable

fightingice
C
Oricorio
#0741

Oricorio

fireflying
D
Cutiefly
#0742

Cutiefly

bugfairy
C
Ribombee
#0743

Ribombee

bugfairy
D
Rockruff
#0744

Rockruff

rock
C
Lycanroc
#0745

Lycanroc

rock
D
Wishiwashi
#0746

Wishiwashi

water
D
Mareanie
#0747

Mareanie

poisonwater
A
Toxapex
#0748

Toxapex

poisonwater
D
Mudbray
#0749

Mudbray

ground
C
Mudsdale
#0750

Mudsdale

ground
D
Dewpider
#0751

Dewpider

waterbug
C
Araquanid
#0752

Araquanid

waterbug
D
Fomantis
#0753

Fomantis

grass
C
Lurantis
#0754

Lurantis

grass
D
Morelull
#0755

Morelull

grassfairy
C
Shiinotic
#0756

Shiinotic

grassfairy
D
Salandit
#0757

Salandit

poisonfire
C
Salazzle
#0758

Salazzle

poisonfire
D
Stufful
#0759

Stufful

normalfighting
C
Bewear
#0760

Bewear

normalfighting
D
Bounsweet
#0761

Bounsweet

grass
D
Steenee
#0762

Steenee

grass
C
Tsareena
#0763

Tsareena

grass
C
Comfey
#0764

Comfey

fairy
C
Oranguru
#0765

Oranguru

normalpsychic
C
Passimian
#0766

Passimian

fighting
D
Wimpod
#0767

Wimpod

bugwater
B
Golisopod
#0768

Golisopod

bugwater
  • 807 total, five more than Sun and Moon. The new additions are Ultra Beasts: Poipole, Naganadel, Stakataka, Blacephalon, and Zeraora. The Alola dex is slightly expanded with more encounter options early.

  • The story diverges around the midpoint. Necrozma absorbs the box legendary to become Ultra Necrozma, one of the hardest boss fights in any Pokemon game. Ultra Warp Ride lets you catch legendaries from every past generation. New Ultra Beasts, more early encounters, and the Mantine Surf minigame are added.

  • Ultra Necrozma has 167 Sp. Atk, 97 Speed, and gets a stat-boosting aura on top of that. It will sweep most teams. Common strategies: Zoroark's Illusion to bait a Fighting-type move, Toxic stalling, or a Focus Sash Pokemon with a super effective hit. It's level 60 and the biggest difficulty spike in the series.

  • A minigame where you fly through Ultra Space on Solgaleo or Lunala. Different colored wormholes lead to different Pokemon. Legendary Pokemon from past generations (Mewtwo, Ho-Oh, Groudon, etc.) appear in the furthest wormholes. It's the main way to catch non-Alolan legendaries without transferring from older games.

  • Still Gen 7, 3DS, 2017. USUM is the enhanced take on Alola. Same Trial system, but the story diverges around the midpoint into Ultra Space content. More Pokemon available earlier, new Ultra Beasts, and a harder endgame stretch.

  • Same three starters as Sun and Moon. Litten's Incineroar is still the most practical for the story since Intimidate neuters Totem Pokemon. But team building matters more in USUM because Ultra Necrozma demands a specific answer on your squad.

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Pokemon Comparison