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.

C
Mesprit
#0481

Mesprit

psychic
B
Azelf
#0482

Azelf

psychic
S
Dialga
#0483

Dialga

steeldragon
S
Palkia
#0484

Palkia

waterdragon
A
Heatran
#0485

Heatran

firesteel
B
Regigigas
#0486

Regigigas

normal
S
Giratina
#0487

Giratina

ghostdragon
B
Cresselia
#0488

Cresselia

psychic
D
Phione
#0489

Phione

water
B
Manaphy
#0490

Manaphy

water
B
Darkrai
#0491

Darkrai

dark
C
Shaymin
#0492

Shaymin

grass
S
Arceus
#0493

Arceus

normal
B
Victini
#0494

Victini

psychicfire
D
Snivy
#0495

Snivy

grass
D
Servine
#0496

Servine

grass
B
Serperior
#0497

Serperior

grass
D
Tepig
#0498

Tepig

fire
D
Pignite
#0499

Pignite

firefighting
C
Emboar
#0500

Emboar

firefighting
D
Oshawott
#0501

Oshawott

water
D
Dewott
#0502

Dewott

water
C
Samurott
#0503

Samurott

water
D
Patrat
#0504

Patrat

normal
D
Watchog
#0505

Watchog

normal
D
Lillipup
#0506

Lillipup

normal
D
Herdier
#0507

Herdier

normal
C
Stoutland
#0508

Stoutland

normal
D
Purrloin
#0509

Purrloin

dark
C
Liepard
#0510

Liepard

dark
D
Pansage
#0511

Pansage

grass
C
Simisage
#0512

Simisage

grass
D
Pansear
#0513

Pansear

fire
C
Simisear
#0514

Simisear

fire
D
Panpour
#0515

Panpour

water
C
Simipour
#0516

Simipour

water
D
Munna
#0517

Munna

psychic
C
Musharna
#0518

Musharna

psychic
D
Pidove
#0519

Pidove

normalflying
D
Tranquill
#0520

Tranquill

normalflying
C
Unfezant
#0521

Unfezant

normalflying
D
Blitzle
#0522

Blitzle

electric
C
Zebstrika
#0523

Zebstrika

electric
C
Roggenrola
#0524

Roggenrola

rock
C
Boldore
#0525

Boldore

rock
C
Gigalith
#0526

Gigalith

rock
D
Woobat
#0527

Woobat

psychicflying
C
Swoobat
#0528

Swoobat

psychicflying
  • 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