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Pokemon Ultra Something Sun

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Download Pokemon Ultra Something Sun ROM for Nintendo 3DS.

Pokemon Ultra Something Sun rom

ROM Information

Pokemon Ultra Something Sun is a 3DS ROM Hack by Big Baz based on Pokemon Ultra Sun in English. It was last updated on January 08, 2026.

Also, be sure to check out Pokemon Ultra Sun QOL Edition.

Description

Pokemon Ultra Something is a ROM hack of Pokémon Ultra Sun and Pokémon Ultra Moon. I originally made it for my own enjoyment, but since it took me a fairly long time to complete, I thought it might be worth putting it somewhere public in case anyone else finds it interesting/useful. If not, no big deal; I can still play it myself. It’s not a radical overhaul of the game by any means – just a fairly standard difficulty hack (intended to be playable with the Exp. Share off) where you can catch all 807 Pokémon, with some extra changes on top. Basically, every edit I made was done via pk3DS. I’m not very good with names, hence why it’s called Ultra Something.

Features

Pokémon changes

  • Nearly every Pokémon has had their level-up moveset overhauled.
  • They now learn more moves by level-up than before, and their movesets can include moves they can’t normally learn in USUM, but can learn in other games. This covers everything from new moves in the Scarlet/Violet DLC (such as Knock Off Tyranitar) to Game Boy-era moves (such as Lovely Kiss Snorlax).
  • Egg moves have been altered too – I’ve removed Egg moves that Pokémon can now learn by levelling up, and added some (mostly useless) extra moves that might have some niche applications.
  • TM and Move Tutor compatibility has been updated; if a Pokémon can learn a given TM/Tutor move in any official game, it is compatible with that TM/Tutor move in Ultra Something.
  • Pokémon now have their Hidden Ability as one of their regular Abilities, if they didn’t already have two regular Abilities.
  • Some Pokémon who only have access to certain Abilities in other games can now use those Abilities in this hack: Gengar can have Levitate, the Koffing line can have Stench, and the Piplup line can have Competitive (though they keep Defiant as their Hidden Ability).
  • A few Pokémon with excessively late evolution levels can now evolve a bit earlier (e.g. Deino evolves at Level 35 and then Level 54, instead of 50 and 64).
  • Pokémon who evolved by being traded now have alternative evolution methods that can be used instead.
  • Some of the more complex evolution methods (e.g. Inkay and Sliggoo) have been simplified into regular “evolves at Level X” evolutions.
  • Every Pokémon also has a chance of holding an item when encountered in the wild. Most of them aren’t massively useful, but you might get some nice Berries or other items from it.

Wild Pokémon changes

  • You can obtain all 807 Pokémon in this hack, so naturally, wild Pokémon are a lot more varied than in vanilla USUM.
  • Every non-Legendary/Mythical Pokémon should be available before the Pokémon League, and even among the Legendary/Mythical Pokémon, there are only about 20 that can’t be caught before the postgame.
  • You can also obtain all the forms of Pokémon such as Unown and Vivillon. I threw in Eternal Flower Floette as well, because I felt bad leaving it out.
  • While this does mean the wild encounter tables are a bit messy and cramped, I’ve tried to space things out as well as I can. You can find new species of Pokémon in nearly every storyline location, from Route 1 to Mount Lanakila.
  • The Island Scan feature now exclusively finds Mythical Pokémon. The same set of 7 Pokémon can all be found on one day of the week on each of Alola’s islands.
  • The “regular” Pokémon found through Ultra Warp Ride are now all Legendary Pokémon, Mythical Pokémon or Ultra Beasts. This allows you to catch Pokémon that otherwise aren’t available in USUM, or catch multiple copies of Pokémon that are otherwise only available once.
  • Nearly all wild Pokémon can call for help, and all unevolved Pokémon have a chance to summon their evolved forms. This chance is higher in locations that you reach later in the game.
  • If a Pokémon calls for help during rain, hail or a sandstorm, it might summon a completely different species of Pokémon that you otherwise wouldn’t encounter in that location. This can help if you want to want to catch certain “late-game” Pokémon a bit earlier on.
  • In the postgame, you can rarely find wild Cosmog on the eastern half of Poni Island, and they summon various Legendary Pokémon depending on the location. This lets you catch Legendary Pokémon that would otherwise be exclusive to the other game version.

Trainer/Trial changes

  • The game is generally more difficult than the vanilla games, though not ridiculously so.
  • All Trainers are notably more competent, having better AI and maxed IVs, carrying more Pokémon on average, and using a greater variety of Pokémon.
  • Their Pokémon also have hand-picked movesets and Abilities, instead of carrying the default moves for their level like wild Pokémon.
  • Having said that, they shouldn’t be unbeatable. However, Ace Trainers and Veterans (and Black Belts to an extent) do carry more “competitive” teams, so be careful when battling them.
  • I don’t personally like giving important “boss” Trainers full teams of 6 by default, so you won’t see them with full teams until the Elite Four, but they should pose a challenge regardless.
  • They will use Mega Evolutions too, but only in the postgame, since that’s when they first become available to you.
  • Totem Pokémon have been altered to put up more of a fight as well.
  • Their ally Pokémon have also been edited – and in some cases, replaced with new Pokémon – as well as the other Pokémon that appear during their Trials.

Battle Tree/Agency changes

  • All of the 996 Pokémon sets used in the Battle Tree have been edited.
  • Some of them have had their forms changed, so you might get to battle things like Dusk Form Lycanroc or Ash-Greninja, who never appeared in the Battle Tree in vanilla USUM.
  • I’ve removed lots of “hax” from their sets, so things like evasion-boosting moves, Quick Claws and OHKO moves won’t show up. Now it’s harder to lose because of pure luck (or blame your losses on RNG).
  • Generally speaking, even the low-quality sets will simply be a bit gimmicky (e.g. a Rock Polish Avalugg with attacks that can cause flinching) instead of being outright bad (e.g. a special attacking Avalugg).
  • Each possible opponent Trainer still uses the same species of Pokémon as before.
  • Trainers who use teams that rely on setting up certain types of weather, or Trick Room, will still have those moves on the same Pokémon as before; I didn’t want to mess around with their strategies.
  • These changes are mostly geared towards Single Battles, so there are no Helping Hand users or similar sets. They’ll still show up in Double/Multi Battle formats too, and should still provide a challenge in those formats.
  • I didn’t edit the Battle Agency itself, but since it uses the same pool of Pokémon as the Battle Tree, these new Pokémon sets will also show up in the Battle Agency as well.

Battle Royal changes

  • All of the Pokémon sets used in the Battle Royal have been edited, and 501 new ones have been added, for a total of 999 sets.
  • The Pokémon variety has been increased. Every fully-evolved Pokémon that is eligible to take part in Battle Royals can be fought in at least one of the ranks, and most of the alternate forms of Pokémon like Sawsbuck, Minior and Silvally can show up in some battles.
  • The strength of your opponents now scales a bit better than in vanilla USUM. You can find the likes of Farfetch’d, Sunflora and various unevolved Pokémon in Normal Rank battles, whereas Pokémon such as Ultra Beasts, the guardian deities, and Eternal Flower Floette are only fought in Master Rank.
  • The Masked Royal still appears after you win five Master Rank battles in a row, and he now uses a different set of Pokémon. (There’s still no extra reward for beating him – it’s just for fun.)
  • With all that said, it’s still basically the same format as before, so if you weren’t too bothered about the Battle Royal in the vanilla games, I don’t think you’ll suddenly enjoy this one.

Shop item changes

  • All Poké Marts now sell Adrenaline Orbs right after you complete your first Trial (meaning Poké Toys are now only available after your third Trial).
  • The Route 2 Poké Mart sells Apricorn Poké Balls.
  • The Route 8 Poké Mart sells most Evolution items, while Evolution stones can be purchased in Konikoni City; some are sold in Olivia’s jewellery store, while others are sold at the Poké Mart.
  • Mount Hokulani’s Poké Mart sells Feathers (formerly known as Wings) instead of vitamins, and Feathers now provide 4 EVs per use instead of 1 EV.
  • The Tapu Village Poké Mart sells EV-reducing Berries.
  • The BP shops found on beaches sell various new items, including Sacred Ashes, Ability Capsules and Bottle Caps.
  • The Battle Royal Dome now sells PP Ups and PP Maxes in addition to the regular vitamins.
  • The held items sold at the Battle Royal Dome are a lot cheaper, and have changed slightly.
  • The Battle Tree also sells different items for lower prices than usual, including Mega Stones, which now cost 8 BP each instead of 64 BP.
  • You can also buy Master Balls at the Battle Tree for 48 BP. It’s not as if catching Legendary/Mythical Pokémon is particularly hard anyway with items like Timer Balls and Rotom Powers, so it doesn’t seem unfair to be able to buy Master Balls at a fairly steep price once the storyline is basically over.
  • Move Tutors teach the same moves as before, but they’re slightly cheaper overall.

Text/misc. changes

  • You can now receive different Pokémon from the in-game trades with NPC Trainers throughout Alola. They usually offer Pokémon that you otherwise wouldn’t be able to obtain until late-game.
  • The Pickup Ability can now find different items, generally of a higher quality than before.
  • Some Pokémon have had their experience groups changed. The only ones that are now in the “Slow” experience group are Legendary and Mythical Pokémon, and Ultra Beasts.
  • Every Pokémon has a 50:50 gender ratio, provided they could be male or female already.
  • I believe I’ve removed all the Shiny locks on Pokémon that you can actually catch (e.g Ultra Necrozma won’t be shiny when you fight it at Megalo Tower, but it could be when you can catch it later on). I haven’t tested this though.
  • Some other small changes I’ve made can be found in the Misc. Changes document.
  • The Rotom Dex has had some of its dialogue reduced in length, specifically when it gives advice you didn’t ask for.
  • Some of the Ultra Beasts now use their Pokédex entries from the opposite game version, instead of having a generic copy-paste Pokédex entry shared with two other Ultra Beasts.
  • The description text for moves, items and Abilities has been significantly edited to better describe what those things do. Examples include: adding the exact percentage chances of secondary effects occurring (e..g. the 30% paralysis chance of Body Slam), listing more obscure mechanics that aren’t described in the vanilla games (e.g. Heatproof halving burn damage), and listing the out-of-battle effects of Abilities such as Magnet Pull and Suction Cups.
  • These new descriptions aren’t perfect, because some things like Sheer Force and Everstones are tricky to fully describe with only three lines of text, but they should do a better job of explaining the game’s mechanics than before.

Glitches and issues

  • The events associated with some Mythical Pokémon don’t work properly unless they have a fateful encounter flag; if they were caught in this hack, they won’t have that flag. You can add this flag with a save editor such as PKHeX (just rename it to PKHaX first), but in case that’s not an option, I’ve implemented some workarounds where possible:
    • Mew can’t be used to receive the Mewnium Z (renamed Mewnium ZX in this hack; see below) in Heahea City, but Mewnium ZX can be found held by wild Mew. The item they hold is the Key Item version; you need to remove their held item and give it back to them before it will work as a Z-Crystal.
    • Shaymin can’t use the Gracidea to transform into its Sky Forme. I couldn’t find any way around this, unfortunately.
    • Keldeo can’t be taught Secret Sword by the Move Tutor at the Hano Grand Resort, nor can it transform from Ordinary Form to Resolute Form. It learns Secret Sword at Level 52 instead, and will be in its Resolute Form when caught; it will stay in this form until it forgets Secret Sword.
    • Meloetta can’t be taught Relic Song by the Move Tutor at the Hano Grand Resort, but it can learn Relic Song at Level 55.
    • Diancie can’t be used to receive the Diancite in Konikoni City, but Diancites can be purchased at the Battle Tree.
    • Marshadow can’t be used to receive the Marshadium Z (renamed Marshadium ZX in this hack) in Heahea City, but Marshadium ZX can be found held by wild Marshadow. As with Mew, you need to remove their held item and give it back before it will work.
  • The species-exclusive Z-Crystals (such as Pikanium Z and Snorlium Z) now have an X on the end of their names, e.g. Pikanium ZX. This was a workaround to a problem I was having with pk3DS, and without it, I wouldn’t be able to make Mew or Marshadow’s Z-Crystals available.
  • Some bits of text on the Rotom Dex are slightly glitchy, sometimes adding blank lines or parentheses where they shouldn’t be. The text is still readable, though.
  • If you open your Boxes using a PC and use the search mode, several Abilities will have blank spaces where their descriptions should be. This is because their new descriptions are too large to fit in that particular text box. (Incidentally, this glitch also appears in the vanilla Gen 7 games, but it only affects Battle Bond.)

Changelog

V1.3.2

  • Many Pokémon have been given new level-up moves, Egg Moves, or made compatible with new TM/Tutor moves, based on moves they gained access to in the Mega Dimension DLC.
  • Examples include Calm Mind Milotic, Moonblast Wigglytuff, and Parabolic Charge Rotom.
  • Various Trainers and battle facility sets have also been edited to make use of these new moves.

V1.3.1

  • Previously, Slowpoke would be able to evolve into Slowking if it held a King’s Rock and levelled up (as intended), but only if it was at least Level 32 (which was not intended).
  • Even then, it would also meet the requirements to evolve into Slowbro (being Level 32 or higher), and evolve into Slowbro instead, because Slowbro is listed before Slowking in the game’s list of Slowpoke’s evolutions.
  • Now, Slowpoke can evolve into Slowking at any level, and if it meets the criteria for evolving into Slowbro and Slowking at the same time, it will evolve into Slowking instead (because you probably wouldn’t give it a King’s Rock if you wanted a Slowbro).

V1.3

  • Several Pokémon have been given new level-up, TM, Move Tutor or Egg Moves based on the moves they can learn in Pokémon Legends: Z-A.
  • The teams used by some Trainers throughout the game have been edited to incorporate some of these new moves.
  • Some Pokémon sets used in the Battle Tree and Battle Royal have also been edited for the same reason.
  • Pokémon found by fishing at bubbling spots can no longer appear at levels above every other wild Pokémon in the area.
  • Wild Chansey found in Poni Plains (as well as the other Pokémon encountered via rustling bushes) now appear at slightly higher levels.

File Name

Pokemon Ultra Something Sun

Cart Size

2.67GB

Version

1.3.2

Console

3DS

Region

World

Genre

RPG

Publisher

Developer

Release Date

January 08, 2026

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