Pokemon: Kanto Expansion Pak 100% Pokedex | Part 24: Cinnabar Pokemon Mansion
This is a ROM Hack of Pokémon Red and Blue, aiming to expand the Kanto region with new Kanto-related Pokemon, more interesting locations, and QoL changes.
New Pokemon
The Kanto Expansion Pak's ethos is to add every "Kanto-related" Pokemon to RBY without fundamentally changing the grander metagame. What's defined as "Kanto-related" is a Pokemon that evolves from an existing Kanto Pokemon, made an appearance in a Kanto-based game (LGPE), is a regional variant, or was a Kanto-related Pokemon cut during the development of an official game.
35 known prototype Pokemon that were cut from Red and Green; eg. Gorochu, Kotora
Evolutions or pre-evolutions of a Kanto Pokemon found in a future generation eg. Steelix, Glaceon, Kleavor, Annihilape
Evolutions of Kanto Pokemon found in the SpaceWorld '97 demo of Gold and Silver; eg. Luxwan, Bellignan
All fully-evolved regional variants of Kanto Pokemon; eg. Alolan Muk, Galarian Slowbro, Hisuian Arcanine, Paldean Tauros
Meltan and Melmetal from Let's Go Pikachu and Let's Go Eevee.
Paradox Pokemon from Scarlet & Violet; Scream Tail and Sandy Shocks.
Johto baby Pokemon and regional pre-evolutions were omitted due to RBY using an 8-bit register. This hack as-is just barely manages to fit everything. A refactor to a 16-bit register is possible and has been done before, but only on a really old pokered version that would require a ton of its own refactoring to be modernised. It's just not feasible at this current time.
New Types
To accomodate the new Pokemon, the Dark, Steel, and Fairy types are added. They are effectively "tacked on", with no vanilla Pokemon or moves being changed, which is a big part of what this hack wants.
Dark and Steel use their SpaceWorld '97 type matchups because these revisions were produced prior to the national tournament that year, and thus before Game Freak made appropriate balancing changes. Thus, what you get here are types that are very different, but maintain the core RBY experience. Normal and Psychic remain extremely powerful types, BoltBeam remains perfect coverage, and so on. Fairy lacks a confirmed older revision, so it remains the same as XY's, which has not yet changed, and if it does, this hack will not change with it. Closer to RBY is what we want!
Fairy is identical to its XY release, which at the time of writing remains the same as modern releases.
Dark and Steel use their type effectiveness from the SW97 demo, aiming to be closer to RBY experience.
Bite is still Normal-type.
The Clefairy, Mime Jr, and Jigglypuff lines are not Steel or Fairy-type, respectively.
This (and Bite) was done to ensure the original Kanto Pokemon were unaltered in any way.
While Magnemite, Magnetite and Magneton are pure Electric, Magnezone is part-Steel.
Scream Tail remains Fairy/Psychic.
Fire remains neutral against Ice.
Bug and Poison remain super effective against each other.
Psychic remains immune to Ghost.
Type Matchups for Steel and Dark for reference:
Steel...
Attacks are Super Effective vs: Rock, Fairy
Attacks are Not Very Effective vs: Water, Electric
Attacks do no Damage vs: Steel
Pokemon are weak to: Water, Electric
Pokemon resist: Poison, Rock, Fighting, Fairy
Pokemon are Immune To: Steel
Dark...
Attacks are Super Effective vs: Ghost, Psychic, Dark
Attacks are Not Very Effective vs: Normal, Fairy
Pokemon are Weak to: Normal, Dark, Fairy
Pokemon resist: Ghost, Psychic
Naturally, these types get appropriate moves. They are currently distributed to exclusively new Pokemon, with the vanilla bunch untouched. The only moves imported have effects that are exactly replicable in RBY's code for consistency reasons.
Steel: Bullet Punch, Iron Defense, Iron Head, Magnet Bomb, Metal Sound, Mirror Shot, Smart Strike
Dark: Brutal Swing, Fake Tears, False Surrender, Feint Attack, Kowtow Cleave, Nasty Plot, Night Slash
Fairy: Charm, Dazzling Gleam, Disarming Voice, Draining Kiss, Fairy Wind, Play Rough, Sweet Kiss
New Items
There are some new items here, with the aim of accomodating new Pokemon, adding features, and acting as methods of getting to new locations.
All 151 original Pokemon, plus an additional 100, can be obtained without the use of trading or glitches, including Mew!
New Pokemon
The Kanto Expansion Pak's ethos is to add every "Kanto-related" Pokemon to RBY without fundamentally changing the grander metagame. What's defined as "Kanto-related" is a Pokemon that evolves from an existing Kanto Pokemon, made an appearance in a Kanto-based game (LGPE), is a regional variant, or was a Kanto-related Pokemon cut during the development of an official game.
35 known prototype Pokemon that were cut from Red and Green; eg. Gorochu, Kotora
Evolutions or pre-evolutions of a Kanto Pokemon found in a future generation eg. Steelix, Glaceon, Kleavor, Annihilape
Evolutions of Kanto Pokemon found in the SpaceWorld '97 demo of Gold and Silver; eg. Luxwan, Bellignan
All fully-evolved regional variants of Kanto Pokemon; eg. Alolan Muk, Galarian Slowbro, Hisuian Arcanine, Paldean Tauros
Meltan and Melmetal from Let's Go Pikachu and Let's Go Eevee.
Paradox Pokemon from Scarlet & Violet; Scream Tail and Sandy Shocks.
Johto baby Pokemon and regional pre-evolutions were omitted due to RBY using an 8-bit register. This hack as-is just barely manages to fit everything. A refactor to a 16-bit register is possible and has been done before, but only on a really old pokered version that would require a ton of its own refactoring to be modernised. It's just not feasible at this current time.
New Types
To accomodate the new Pokemon, the Dark, Steel, and Fairy types are added. They are effectively "tacked on", with no vanilla Pokemon or moves being changed, which is a big part of what this hack wants.
Dark and Steel use their SpaceWorld '97 type matchups because these revisions were produced prior to the national tournament that year, and thus before Game Freak made appropriate balancing changes. Thus, what you get here are types that are very different, but maintain the core RBY experience. Normal and Psychic remain extremely powerful types, BoltBeam remains perfect coverage, and so on. Fairy lacks a confirmed older revision, so it remains the same as XY's, which has not yet changed, and if it does, this hack will not change with it. Closer to RBY is what we want!
Fairy is identical to its XY release, which at the time of writing remains the same as modern releases.
Dark and Steel use their type effectiveness from the SW97 demo, aiming to be closer to RBY experience.
Bite is still Normal-type.
The Clefairy, Mime Jr, and Jigglypuff lines are not Steel or Fairy-type, respectively.
This (and Bite) was done to ensure the original Kanto Pokemon were unaltered in any way.
While Magnemite, Magnetite and Magneton are pure Electric, Magnezone is part-Steel.
Scream Tail remains Fairy/Psychic.
Fire remains neutral against Ice.
Bug and Poison remain super effective against each other.
Psychic remains immune to Ghost.
Type Matchups for Steel and Dark for reference:
Steel...
Attacks are Super Effective vs: Rock, Fairy
Attacks are Not Very Effective vs: Water, Electric
Attacks do no Damage vs: Steel
Pokemon are weak to: Water, Electric
Pokemon resist: Poison, Rock, Fighting, Fairy
Pokemon are Immune To: Steel
Dark...
Attacks are Super Effective vs: Ghost, Psychic, Dark
Attacks are Not Very Effective vs: Normal, Fairy
Pokemon are Weak to: Normal, Dark, Fairy
Pokemon resist: Ghost, Psychic
Naturally, these types get appropriate moves. They are currently distributed to exclusively new Pokemon, with the vanilla bunch untouched. The only moves imported have effects that are exactly replicable in RBY's code for consistency reasons.
Steel: Bullet Punch, Iron Defense, Iron Head, Magnet Bomb, Metal Sound, Mirror Shot, Smart Strike
Dark: Brutal Swing, Fake Tears, False Surrender, Feint Attack, Kowtow Cleave, Nasty Plot, Night Slash
Fairy: Charm, Dazzling Gleam, Disarming Voice, Draining Kiss, Fairy Wind, Play Rough, Sweet Kiss
New Items
There are some new items here, with the aim of accomodating new Pokemon, adding features, and acting as methods of getting to new locations.
All 151 original Pokemon, plus an additional 100, can be obtained without the use of trading or glitches, including Mew!
