PokemonStore for a shared pokemon cache

structures/Client.js

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+const { CommandoClient } = require('discord.js-commando');
+const PokemonStore = require('./PokemonStore');
+
+module.exports = class XiaoClient extends CommandoClient {
+	constructor(options) {
+		super(options);
+
+		this.pokemon = new PokemonStore();
+	}
+};

structures/Pokemon.js

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+module.exports = class Pokemon {
+	constructor(data) {
+		this.id = data.id;
+		this.name = data.names.filter(entry => entry.language.name === 'en')[0].name;
+		this.entries = data.flavor_text_entries
+			.filter(entry => entry.language.name === 'en')
+			.map(entry => entry.flavor_text.replace(/\n|\f|\r/g, ' '));
+		this.names = data.names;
+		this.genus = `The ${data.genera.filter(entry => entry.language.name === 'en')[0].genus}`;
+	}
+
+	get displayID() {
+		return this.id.toString().padStart(3, '0');
+	}
+
+	get slug() {
+		return encodeURIComponent(this.name.toLowerCase().replace(/ /g, '-').replace(/[^a-zA-Z0-9-]/g, ''));
+	}
+
+	get spriteImageURL() {
+		return `https://www.serebii.net/sunmoon/pokemon/${this.displayID}.png`;
+	}
+
+	get boxImageURL() {
+		return `https://www.serebii.net/pokedex-sm/icon/${this.displayID}.png`;
+	}
+
+	get serebiiURL() {
+		return `https://www.serebii.net/pokedex-sm/${this.displayID}.shtml`;
+	}
+};

structures/PokemonStore.js

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+const { Collection } = require('discord.js');
+const request = require('node-superfetch');
+const Pokemon = require('./Pokemon');
+
+module.exports = class PokemonStore extends Collection {
+	constructor(iterable) {
+		super(iterable);
+	}
+
+	async fetch(query) {
+		query = encodeURIComponent(query.toLowerCase().replace(/ /g, '-').replace(/[^a-zA-Z0-9-]/g, ''));
+		const num = Number.parseInt(query, 10);
+		if (this.has(num)) return this.get(num);
+		const found = this.find(pokemon => pokemon.slug === query);
+		if (found) return found;
+		const { body } = await request.get(`https://pokeapi.co/api/v2/pokemon-species/${query}/`);
+		const pokemon = new Pokemon(body);
+		this.set(pokemon.id, pokemon);
+		return pokemon;
+	}
+};