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.

D
Lunatone
#0337

Lunatone

rockpsychic
C
Solrock
#0338

Solrock

rockpsychic
D
Barboach
#0339

Barboach

waterground
D
Whiscash
#0340

Whiscash

waterground
D
Corphish
#0341

Corphish

water
B
Crawdaunt
#0342

Crawdaunt

waterdark
D
Baltoy
#0343

Baltoy

groundpsychic
C
Claydol
#0344

Claydol

groundpsychic
C
Lileep
#0345

Lileep

rockgrass
C
Cradily
#0346

Cradily

rockgrass
D
Anorith
#0347

Anorith

rockbug
C
Armaldo
#0348

Armaldo

rockbug
D
Feebas
#0349

Feebas

water
B
Milotic
#0350

Milotic

water
D
Castform
#0351

Castform

normal
C
Kecleon
#0352

Kecleon

normal
D
Shuppet
#0353

Shuppet

ghost
C
Banette
#0354

Banette

ghost
C
Duskull
#0355

Duskull

ghost
C
Dusclops
#0356

Dusclops

ghost
C
Tropius
#0357

Tropius

grassflying
C
Chimecho
#0358

Chimecho

psychic
C
Absol
#0359

Absol

dark
C
Wynaut
#0360

Wynaut

psychic
D
Snorunt
#0361

Snorunt

ice
C
Glalie
#0362

Glalie

ice
D
Spheal
#0363

Spheal

icewater
D
Sealeo
#0364

Sealeo

icewater
C
Walrein
#0365

Walrein

icewater
C
Clamperl
#0366

Clamperl

water
C
Huntail
#0367

Huntail

water
C
Gorebyss
#0368

Gorebyss

water
C
Relicanth
#0369

Relicanth

waterrock
D
Luvdisc
#0370

Luvdisc

water
D
Bagon
#0371

Bagon

dragon
D
Shelgon
#0372

Shelgon

dragon
B
Salamence
#0373

Salamence

dragonflying
D
Beldum
#0374

Beldum

steelpsychic
C
Metang
#0375

Metang

steelpsychic
B
Metagross
#0376

Metagross

steelpsychic
B
Regirock
#0377

Regirock

rock
B
Regice
#0378

Regice

ice
C
Registeel
#0379

Registeel

steel
S
Latias
#0380

Latias

dragonpsychic
B
Latios
#0381

Latios

dragonpsychic
A
Kyogre
#0382

Kyogre

water
A
Groudon
#0383

Groudon

ground
S
Rayquaza
#0384

Rayquaza

dragonflying
  • 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