Pokémon Unbound review and which difficulty mode to pick

The short verdict

Play it. Unbound is still the first ROM hack I tell people to try, and finishing it didn’t change my mind.

It’s a complete FireRed hack by Skeli. You get an original region (Borrius), an original story, 84 missions, a four-facility Battle Frontier, and every Pokémon from Gen 1 to Gen 7 in one save. Nothing else on the GBA gives you that much in one finished game.

A few things are missing. The last patch was 2.1.1.1 in November 2022, Cube Corp. never got an interior, and one Battleground mode is still “planned”. None of it stops you from catching everything or clearing every mission.

The one choice that can ruin a first run is difficulty, and I spent longer on that menu than on the starter crate. If that’s all you came for, jump to the section on which difficulty to pick.

Borrius is a real region, not a Kanto reskin

Borrius is its own map with its own towns and routes. Centuries ago its king summoned a dark force, lost a war, and sealed it away. Now a group called the Shadows wants it back, and the Light of Ruin gets dragged in too. Version 2.0 rewrote the plot into one storyline and redid the characters and UI. That’s the version you’ll play.

The first time I saw the Borrius map I just wandered for an hour instead of following the story.

The pacing is better than most hacks because the story isn’t glued to the gyms. You’ll pick up eight badges, but the big moments are their own set pieces: the Shadow Base, Tarmigan Mansion where Mega Evolution unlocks, and the Hoopa sequence at Crystal Peak. The middle drags. The mission list gets long, and sometimes the main objective is buried two screens down in the log. I lost a whole evening once because I forgot which mission was the story one.

It looks and sounds like a newer game. Gen 4 style overworld, Gen 5 style menus, and over 180 original tracks. There’s a day and night cycle that changes encounters, with day running 5:00 AM to 7:59 PM. If fast-forward lags, lower the audio quality or turn off the BGM. The music is what slows it down.

The mission system is the spine of the game

There are 84 missions, 57 in the main game and 27 in the post-game. They live in the Mission Log. Do them as they show up, because the best stuff comes from them. Mega Stones, Z-Crystals, the DexNav upgrade, the Time Turner, two Master Balls and most of the mythicals all come from missions, not shops.

Three mission counts matter more than any single mission:

• 20 missions: a Ranger at the Fallshore Mission HQ gives you Type: Null, and the lake trio and Swords of Justice missions open up.
• 45 missions: you get a Latiasite or Latiosite, and one of the Eon duo starts roaming.
• 65 missions: you get the Shiny Charm.

Skip missions in the main game and you’ll hit the post-game short of those numbers. I did the boring ones too, and I was glad I had when the counts started paying out.

Only one mission can fail for good. Don’t release or trade the Zygarde from “The Powerhouse of the Cell”, or it breaks. Everything else can wait. The rest of the traps are in missables and mistakes.

The Battle Frontier is worth the price of the ADM

After the Champion, the game asks for ₽250,000 for the ADM at the Seaport Shipyard. Buy it. It replaces every HM and gives you free mining. I’ve never been happier to hand over that much money in a Pokémon game.

After that you have three things to do. There’s the Aklove finale in the Ruins of Void (which unlocks New Game+), the 27 post-game missions, and the Battle Frontier north of Seaport City.

The Frontier has four facilities and a Frontier Brain for each:

• Battle Tower (Palmer)
• Battle Mine (Pablo)
• Battle Circus (Paula)
• Battle Sands (Patroz)

The Antisis Ring Challenge at the Antisis Gym is separate. Every facility is a streak, a loss resets you, and beating a Brain always pays 20 BP. You can pick Level 50 or 100 everywhere except the Mine. Formats go from Standard (Megas and Z-Moves on, Dynamax off, a long legendary ban list) through Smogon OU, Ubers, Little Cup, Monotype and GS Cup, up to No Restrictions with Dynamax.

Spend BP on the stuff that makes team building easy. Move tutors cost 4 to 64 BP, the Nature changer is 50, and the EV maxer is 50. The Ability changer at the Circus is 100 BP, and it’s the only way to swap a Hidden Ability back to a normal one. A Shady Scammer shows up between midnight and 4:49 AM and makes a Pokémon shiny for 500 BP. I stayed up past midnight for him more than once.

The Battleground house in Seaport has a daily gym leader rotation and a Leaders Gauntlet that gives you Victini on any tier. All of it is in the postgame guide.

How it holds up in 2026

It holds up because Skeli finished it. You’re playing 2.1.1.1, a November 2022 hotfix for a Route 12 softlock. It sits on top of 2.1.1, which added Mystery Gift codes and 58 bug fixes. I played the whole thing on mGBA and never hit a blocking bug.

Two things show their age. Gen 8 is bolted on. Galar and Hisui Pokémon only show up as DexNav Special Encounters after you register a Galar Pokémon, and the Zarude Mystery Gift code after the League is the easy way to do that. Seven of them only come by trade through Unbound Cloud: Zacian, Zamazenta, Eternatus, Kubfu, Glastrier, Spectrier and Calyrex. The Frontier Leaders Gauntlet at the Battleground is still a placeholder. Neither one touches the 809-Pokémon National Dex the missions ask for.

Use mGBA. Skip No$GBA, Eclipse, JohnGBA, old VBA builds and old Delta builds. If your in-game day is stuck on Sunday, that’s the emulator. Turn on the real-time clock before you start, because a lot of Borrius runs on it. Setup help is in how to play a ROM hack.

The four difficulty modes (and why “Easy” is not one of them)

The battle modes are Vanilla, Difficult, Expert and Insane. Lots of sites say “Easy to Insane”, but there’s no Easy battle mode. The Easy and Challenging choice is puzzle difficulty, added in 2.0, and it doesn’t touch trainer battles. If you see “Casual” anywhere, that’s what Vanilla was called before 1.1. I went looking for the Easy battle setting myself before I figured that out.

This is what each mode changes.

	Vanilla	Difficult	Expert	Insane
Level caps (0 to 8 badges)	15 to 66	20 to 75	20 to 75	20 to 75
Capped Exp. Share default	Off	Asked at setup	On	On
Boss scaling	Only the Elite Four scale to your party	All bosses scale to your highest-level Pokémon	Same as Difficult	Same as Difficult
Regular trainer scaling	None	5 to 7 levels below your highest	5 to 7 levels below your highest	2 levels below your highest
Trainer EVs	None noted	None noted	Aces, Experts and trainers after badge 4 get full EVs in two stats	Same, but from badge 2
Item use in trainer battles (default)	No Restrictions	4 Items Only	4 Items Only	No Items
Macho Brace at start	No	No	Yes	Yes
Stat Scanner	Post-game only	Available	Available	Available
AI	Not listed	Not listed	Not listed	Trainers know about your unrevealed type-resisting Berries
Extras	Cosmog available before post-game	Priority abilities banned at Antisis Gym	Stronger gym gimmicks (Crater Town 1/12 HP per turn, Polder heavy rain)	Minimize banned, Sleep Clause on you, trading and Impostor locked until post-game, Hoopa Max Raid, some Ubers on Skeli, Golche and Cynthia

Level caps if you turn on Capped Exp. Share:

Badges	Vanilla	Difficult and above
0	15	20
1	22	26
2	29	32
3	33	36
4	37	40
After Tarmigan Mansion	43	45
5	51	52
6	55	57
7	60	61
8	66	75

Caps go away once you’re Champion. A capped Pokémon still gets 1 EXP per knockout, so it can creep over. If anyone in your party is over the cap, the cap lifts for everyone until they catch up or you box the one that’s over. Pokémon traded in from another game above the cap won’t obey you. In-game trades still obey.

Skeli himself calls Insane a mode built around unfair fights, and he points you to the standalone Battle Frontier Demo if you want hard but fair.

Which modes you can switch mid-game

You can always lower difficulty in Game Settings. Raising it is where you get stuck. Start on Expert or Insane, drop down before you’re Champion, and you can’t go back up. The one exception is switching between Vanilla and Difficult. You can’t bounce down to Vanilla to farm EXP and then climb back to Expert. Don’t be me: read this part before you pick, not after a bad gym.

So you have three paths:

• Start on Vanilla, and you can move up to Difficult later.
• Start on Difficult, and you can drop to Vanilla and come back.
• Start on Expert or Insane, and you’re locked in until the Champion. Dropping early can’t be undone.

On New Game+ you can change it whenever you like. On your first save, Insane is greyed out. The opening quiz suggests a mode and you can pick something else, just not Insane.

Which difficulty should you pick?

Vanilla if it’s your first ROM hack or you mostly want the story. Caps are low, only the Elite Four scales to you, you can use any items, and Cosmog shows up before the post-game. The Stat Scanner is locked until post-game, and overleveling carries you through most fights, so it can feel flat. It’s still a great way to see Borrius the first time.

Difficult if you’ve beaten two or three hacks and want trainers to keep up. This is the one I’d restart on. Every boss scales to your best Pokémon, so grinding past a gym leader does nothing. What wins is a wider team, better coverage, and planning around the four-item limit instead of Potion-stalling. Regular trainers stay 5 to 7 levels under you, so routes don’t drag. When I lost on Difficult, it was always coverage or a bad lead.

Expert if you came from Radical Red or Drayano hacks and want harder gym gimmicks and EV-trained trainers. You start with a Macho Brace, which tells you the game expects you to EV train. The Stat Scanner is there to help. Capped Exp. Share is on by default, so you’ll fight every boss at the cap. If natures, EVs and coverage aren’t second nature yet, the mid-game will wall you.

Insane only on a second save, and only if you want unfair on purpose. Trainers sit 2 levels under your best Pokémon, you can’t use items in trainer battles, Minimize is banned, you’re held to Sleep Clause, and trading is locked until post-game. The AI also knows which resist Berry you’re holding before you reveal it. There’s a “True Insane” Hall of Fame achievement for finishing with caps on the whole time and no settings changed. If you want hard but fair, play Expert or go do the Battle Frontier.

Sandbox, Randomizer and New Game+ in brief

Sandbox Mode is only offered on Expert or Insane, and it’s for competitive testing. Don’t pick it for a normal run. I poked at it for ten minutes and went straight back to my real save. You get:

• A fully upgraded Stat Scanner, free egg and tutor moves
• The DexNav, Dowsing Machine, Porta-PC, Motorbike and Time Turner from the start
• A 100 percent catch rate and a finished National Dex
• 10 times the starting money

Once you’re Champion it moves you to the Battle Frontier and you can’t leave. You can never start New Game+ from a Sandbox save.

Randomizer is three toggles at new game: species, movesets and abilities. On Expert and Insane, boss teams don’t get randomized. A randomized save can’t trade with normal saves through Unbound Cloud.

New Game+ opens after you’re Champion and you beat Aklove in the Ruins of Void. It’s the right way to try Insane. You keep:

• Up to six party Pokémon, reset to level 10 and their base form. They keep egg moves, shininess, EVs, IVs, nature and held items, except Z-Crystals.
• Your Pokédex, minus Special Encounters.
• Most key items, including the Stat Scanner, DexNav and ADM.
• Your costumes.

You can change difficulty whenever you want, the Battle Frontier opens as soon as you reach Seaport City, and Zeraora, Cosmog, Heatran, Volcanion and Diancie show up before the credits.

Still deciding between Unbound and the other big hacks? ROM hacks by difficulty puts it next to Radical Red and SoulGold, and the best ROM hacks list shows where it ranks.