>>27963028>>27963085Addendum, for reference:
the XY site:
http://www.pokemon.co.jp/ex/xy/pokemon/<ul class="selectPanel clearfix">
<li class="sp01"><a href="/ex/xy/pokemon/first3/" class="png">パートナー候補となる3匹</a></li>
<li class="sp02"><a href="/ex/xy/pokemon/new/" class="png">新しいポケモン</a></li>
<li class="sp03"><a href="/ex/xy/pokemon/legend/" class="png">伝説のポケモン</a></li>
<li class="sp04"><a href="/ex/xy/pokemon/mega/" class="png">メガシンカポケモン</a></li>
</ul>
Starter, New, Legend, Mega
The ORAS site:
http://www.pokemon.co.jp/ex/oras/pokemon/<ul class="m_menulist menu_s">
<li class="menulink"><span><a href="#area1"><img class="menuovr" src="/ex/oras/pokemon/img/btn_01.png" alt="冒険の最初のパートナー"></a></span></li>
<li class="menulink"><span><a href="#area2"><img class="menuovr" src="/ex/oras/pokemon/img/btn_02.png" alt="伝説のポケモン"></a></span></li>
<li class="menulink"><span><a href="#area3"><img class="menuovr" src="/ex/oras/pokemon/img/btn_03.png" alt="メガシンカポケモン"></a></span></li>
<li class="menulink"><span><a href="#area4"><img class="menuovr" src="/ex/oras/pokemon/img/btn_04.png" alt="その他"></a></span></li>
</ul>
Starter, Legend, Mega, Mythical
Both have Mega right after Legendaries, for whatever that is worth, even though the code does not seem to have been reused since the sites are so radically changed each time.