fusion.user.js

// ==UserScript==
// @name         Automated Permalink
// @namespace    http://tampermonkey.net/
// @version      2.0
// @description  automatically synchronizes permalink to fusion
// @author       Patrick Roberts
// @match        http://pokemon.alexonsager.net/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    var image = document.getElementById('pk_img');

    window.addEventListener('popstate', function () {
        var match = location.pathname.match(/\/(\d+)\/(\d+)/);

        pokego(match[1], match[2]);
    });

    function updateHistory() {
        var prev = location.pathname;
        var next = image.src.replace(/.*(\d+)\/\1\.(\d+).*/, '/$2/$1');

        if (prev === '/') {
            history.replaceState(null, document.title, next);
        } else if (prev !== next) {
            history.pushState(null, document.title, next);
        }
    }

    image.addEventListener('load', updateHistory);
    updateHistory();
})();