Megaten

About

A fan-made, unofficial collection of demons and skills from the "Megaten" series, primarily consisting of the Shin Megami Tensei and Persona franchises.

This package currently contains the following data from the games, with more being added over time:

Game	Skills	Demons/Personas	Guests/Party Member Personas	Enemies/Shadows	Bosses
Shin Megami Tensei V	Yes	Yes	No	Yes	Yes
Persona 5 (Vanilla/Royal/Strikers)	Yes	Yes	Yes	No	No
Persona 4 (Vanilla/Golden)	Yes	Yes	Yes	No	No
Persona 3 (Vanilla/FES/Portable)	No	No	Yes	No	No

NOTE: This is not a 1:1 database of all past data. Information such as MP amounts and damage values may be adjusted to the latest mainstream release, and more changes are found in the Notes section.

Usage

This package requires Node.js v14.0.0 or higher.

First, install it by running the following command in your terminal:

npm install megaten

After installation, you may use it through methods such as the following:

const { Demon, Skill, Persona } = require('megaten'); // Supports CommonJS, ES6, star import, and destructuring syntax

// get() functions find by the input's name without attention to capitalization, spaces, punctuation, etc.
const jack = Demon.get('Jack Frost!!!'); // Gets a Demon instance; may also return a Persona instance, typeguarded via Demon.prototype.isPersona()
const bufu = Skill.get('bufu'); // Gets a Skill instance
const zorro = Persona.get('ZORRO!'); // Gets a guaranteed Persona instance

const demonArray = Demon.array; // Gets an array of all demons
const demonMap = Demon.map; // Gets a map of all demons, keyed by their devName properties
// The other structures also have static .array and .map properties
const skillArray = Skill.array;
const personaMap = Persona.map;

// All get() functions take optional arguments that guard against missing structures
const nullDemon = Demon.get('Kazuma Kaneko'); // Type: Demon | null; returns null
const errorDemon = Demon.get('Masayuki Doi', true); // Type: Demon; throws a MegatenError

Demons

Most demons follow an identical template. However, the Persona subclass (differentiated by the 'Persona' race) have additional properties.

Examples

Demon {
  name: 'Jack Frost',
  aliases: [],
  devName: 'jackfrost',
  affinities: {
    skillPotential: {
      Phys: 0,
      Fire: -5,
      Ice: 4,
      Elec: 0,
      Force: 0,
      Light: 2,
      Dark: 0,
      Almighty: 0,
      Ailment: 0,
      Recovery: 0,
      Support: 0
    },
    inherit: 'Ice'
  },
  arcana: 'Magician',
  race: 'Fairy',
  level: 25,
  hp: 119,
  mp: 153,
  stats: {
    st: 14,
    vi: 15,
    ma: 29,
    ag: 21,
    lu: 21
  },
  learnset: [
    {
      name: 'Ice Breath',
      level: 0
    },
    {
      name: 'Jack Bufula',
      level: 0
    },
    {
      name: 'Ice Block',
      level: 26
    },
    {
      name: 'Mahama',
      level: 27
    },
    {
      name: 'Resist Light',
      level: 28
    }
  ],
  resistances: {
    ailments: {
      Charm: 'Weak'
    },
    weak: [
      'Fire'
    ],
    resist: [],
    null: [],
    drain: [
      'Ice'
    ],
    repel: []
  },
  game: 'smt5',
  alignment: {
    moral: 'Neutral',
    ethical: 'Neutral'
  },
  lore: 'A frost spirit made from ice and snow that appears during the winter and melts away in the spring ...',
  origin: 'European',
  isPersona(): false,
  toString(): 'Fairy Jack Frost',
  image: Buffer { ... }
}

Persona {
  name: 'Mercurius',
  aliases: [],
  devName: 'mercurius',
  affinities: {
    skillPotential: null,
    inherit: null
  },
  arcana: 'Magician',
  race: 'Persona',
  level: 1,
  hp: null,
  mp: null,
  stats: {
    st: 2,
    vi: 1,
    ma: 3,
    ag: 3,
    lu: 1
  },
  learnset: [
    {
      name: 'Garu',
      level: 0
    },
    {
      name: 'Dia',
      level: 0
    },
    {
      name: 'Patra',
      level: 5
    },
    // ...
  ],
  resistances: {
    ailments: null,
    weak: [
      'Elec'
    ],
    resist: [
      'Light'
    ],
    null: [
      'Wind'
    ],
    drain: [],
    repel: []
  },
  game: 'p5',
  alignment: null,
  lore: 'The Roman god of travelers and thieves ...',
  origin: 'Greco-Roman',
  user: 'Morgana',
  stage: 2,
  evoSkillName: 'Evade Elec',
  isPersona(): false,
  toString(): "Morgana's Mercurius",
  image: Buffer { ... },
  evolution: Persona { name: 'Diego', ... },
  evoSkillName: 'Evade Elec',
  evoSkill: EvasionSkill { name: 'Evade Elec', ... }
}

Skills

Each skill is marked by a type property which groups similar skill instances together. Refer to the types in src/skill.ts or use your IDE for each type of skill's format.

Example

AttackSkill {
  name: 'Ziodyne',
  aliases: [],
  devName: 'ziodyne',
  unique: false,
  affinity: 'Elec',
  type: 'ATTACK',
  accuracy: 98,
  ailments: [],
  cost: {
    type: 'MP',
    amount: 35
  },
  flags: [],
  max: 1,
  min: 1,
  power: {
    amount: 215,
    display: 'Heavy',
    type: 'Magic'
  },
  range: 'One',
  series: 'smt',
  description: 'Heavy Elec attack to 1 foe.',
  toString(): 'Ziodyne: Heavy Elec attack to 1 foe.'
}

Other Classes

MegatenError

A MegatenError is thrown when a Structure.get(...) function with true as the second argument is unable to find a matching structure.

try {
  Persona.get('Shigenori Soejima', true);
}
catch (e) {
  if (e instanceof MegatenError) {
    console.log({
      name: e.structureName, // 'Shigenori Soejima'
      type: e.structureType // 'Persona'
    });
  }
}

BattleThemes

The BattleThemes namespace includes enums containing Spotify links to the battle themes from the enum's respective game.

BattleThemes.ShinMegamiTensei5.Destruction; // 'https://open.spotify.com/track/2CmTSrnpy8TBl3fdvcjY6P?si=d5bd93a3a0c84778'
BattleThemes.Persona5.LastSurprise; // 'https://open.spotify.com/track/4cPnNnTMkJ6soUOUzEtmcp?si=01eee74b90ab45a9'

Enemies

The arrays smt5StandardEnemies and smt5Bosses contain data for Shin Megami Tensei V standard enemies and bosses, respectively. Due to their simplistic nature, each is a normal object rather than a class instance. Bosses have the same structure as standard enemies except for the addition of a theme property with their battle theme and an optional variant property for special designs of the character, such as Amanozako's "Berserk" variant and Lahmu's "Bound" and "Unbound" variants.

Notes

• Attack skills prior to SMTV have their base power adjusted to be proportional to newer damage values. If you need damage values relative to particular games, please check the links in the Credits section.
• Ailment chances prior to SMTV were estimated based on known chances of ailments with similar display chances. This information will be updated if the exact odds are deduced.
• Skills with major changes to their function (e.g. Taunt in SMTV vs. Taunt in P5) are split into separate skills ("Taunt" vs. "Taunt - Persona").
• Dashes are used instead of parentheses due to a similar naming scheme used in official song titles (e.g. "Last Surprise - Scramble").
• Skills with specific uses and few similar skills are placed into a "MISC" type.
• Typings are designed to be as specific as possible for IntelliSense and TypeScript usage.
• Images originate from the best obtainable picture of the demon found at the current time. These will be updated if/when renders are available for many Personas and classic demons.
• Terms with multiple series-dependent names are given the name from SMTV (e.g. MP over SP, Vitality over Endurance, Light over Bless, Seal over Forget and Silence). However, Force and Wind remain separated.
• Kouha/Eiha skills were changed to Hama/Mudo skills since the latter also deal damage in the latest installments.

Credits

Atlus retains all rights to the Megami Tensei series. This data originates from the Megaten Fusion Tool, Megami Tensei Wiki, and the videogames themselves.