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
Slaking
#0289

Slaking

normal
C
Nincada
#0290

Nincada

bugground
C
Ninjask
#0291

Ninjask

bugflying
C
Shedinja
#0292

Shedinja

bugghost
D
Whismur
#0293

Whismur

normal
D
Loudred
#0294

Loudred

normal
C
Exploud
#0295

Exploud

normal
D
Makuhita
#0296

Makuhita

fighting
C
Hariyama
#0297

Hariyama

fighting
D
Azurill
#0298

Azurill

normalfairy
C
Nosepass
#0299

Nosepass

rock
D
Skitty
#0300

Skitty

normal
C
Delcatty
#0301

Delcatty

normal
D
Sableye
#0302

Sableye

darkghost
C
Mawile
#0303

Mawile

steelfairy
C
Aron
#0304

Aron

steelrock
C
Lairon
#0305

Lairon

steelrock
C
Aggron
#0306

Aggron

steelrock
D
Meditite
#0307

Meditite

fightingpsychic
D
Medicham
#0308

Medicham

fightingpsychic
D
Electrike
#0309

Electrike

electric
C
Manectric
#0310

Manectric

electric
C
Plusle
#0311

Plusle

electric
C
Minun
#0312

Minun

electric
C
Volbeat
#0313

Volbeat

bug
C
Illumise
#0314

Illumise

bug
C
Roselia
#0315

Roselia

grasspoison
D
Gulpin
#0316

Gulpin

poison
C
Swalot
#0317

Swalot

poison
D
Carvanha
#0318

Carvanha

waterdark
C
Sharpedo
#0319

Sharpedo

waterdark
C
Wailmer
#0320

Wailmer

water
C
Wailord
#0321

Wailord

water
D
Numel
#0322

Numel

fireground
C
Camerupt
#0323

Camerupt

fireground
B
Torkoal
#0324

Torkoal

fire
D
Spoink
#0325

Spoink

psychic
C
Grumpig
#0326

Grumpig

psychic
D
Spinda
#0327

Spinda

normal
C
Trapinch
#0328

Trapinch

ground
D
Vibrava
#0329

Vibrava

grounddragon
C
Flygon
#0330

Flygon

grounddragon
C
Cacnea
#0331

Cacnea

grass
C
Cacturne
#0332

Cacturne

grassdark
D
Swablu
#0333

Swablu

normalflying
C
Altaria
#0334

Altaria

dragonflying
C
Zangoose
#0335

Zangoose

normal
C
Seviper
#0336

Seviper

poison
  • 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