Other Metagame - Type Exchange

config formats.js

{
    name: "Type Exchange",
    desc: [
        "&bullet; <a href=\"http://www.smogon.com/forums/threads/type-exchange.3556479/\">Type Exchange Metagame Discussion</a>",
        "&bullet; <a href=\"http://www.smogon.com/forums/threads/type-exchange.3556479/page-2#post-6547201/\">Gothitelle & Gothorita Quick Ban</a>"
    ],
    section: "Other Metagames",
    ruleset: [/*'OU',*/ 'Pokemon', 'Standard', 'Team Preview', 'Swagger Clause', 'Baton Pass Clause'],
    banlist: ['Uber', 'Soul Dew', 'Gengarite', 'Kangaskhanite', 'Lucarionite', /*'Shadow Tag',*/ 'Gothitelle', 'Gothorita'],
    onBegin: function () {
        [this.p1.pokemon,this.p2.pokemon].forEach(function(pokemons) {
            let last_pokemon = {
                types: pokemons[pokemons.length-1].types,
                typesData: pokemons[pokemons.length-1].typesData,
            };
            for (let i = pokemons.length-1; i > 0; i--) {
                pokemons[i].types = pokemons[i-1].types;
                pokemons[i].typesData = pokemons[i-1].typesData;
            }
            pokemons[0].types = last_pokemon.types;
            pokemons[0].typesData = last_pokemon.typesData;
        })
    },
},