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.

B
Jirachi
#0385

Jirachi

steelpsychic
S
Deoxys
#0386

Deoxys

psychic
D
Turtwig
#0387

Turtwig

grass
D
Grotle
#0388

Grotle

grass
C
Torterra
#0389

Torterra

grassground
D
Chimchar
#0390

Chimchar

fire
D
Monferno
#0391

Monferno

firefighting
A
Infernape
#0392

Infernape

firefighting
D
Piplup
#0393

Piplup

water
D
Prinplup
#0394

Prinplup

water
B
Empoleon
#0395

Empoleon

watersteel
D
Starly
#0396

Starly

normalflying
D
Staravia
#0397

Staravia

normalflying
C
Staraptor
#0398

Staraptor

normalflying
D
Bidoof
#0399

Bidoof

normal
C
Bibarel
#0400

Bibarel

normalwater
D
Kricketot
#0401

Kricketot

bug
C
Kricketune
#0402

Kricketune

bug
D
Shinx
#0403

Shinx

electric
D
Luxio
#0404

Luxio

electric
C
Luxray
#0405

Luxray

electric
D
Budew
#0406

Budew

grasspoison
C
Roserade
#0407

Roserade

grasspoison
C
Cranidos
#0408

Cranidos

rock
C
Rampardos
#0409

Rampardos

rock
D
Shieldon
#0410

Shieldon

rocksteel
C
Bastiodon
#0411

Bastiodon

rocksteel
D
Burmy
#0412

Burmy

bug
D
Wormadam
#0413

Wormadam

buggrass
D
Mothim
#0414

Mothim

bugflying
D
Combee
#0415

Combee

bugflying
C
Vespiquen
#0416

Vespiquen

bugflying
C
Pachirisu
#0417

Pachirisu

electric
C
Buizel
#0418

Buizel

water
C
Floatzel
#0419

Floatzel

water
D
Cherubi
#0420

Cherubi

grass
C
Cherrim
#0421

Cherrim

grass
D
Shellos
#0422

Shellos

water
B
Gastrodon
#0423

Gastrodon

waterground
C
Ambipom
#0424

Ambipom

normal
D
Drifloon
#0425

Drifloon

ghostflying
C
Drifblim
#0426

Drifblim

ghostflying
D
Buneary
#0427

Buneary

normal
C
Lopunny
#0428

Lopunny

normal
C
Mismagius
#0429

Mismagius

ghost
C
Honchkrow
#0430

Honchkrow

darkflying
D
Glameow
#0431

Glameow

normal
C
Purugly
#0432

Purugly

normal
  • 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