Talk:True Lab/@comment-4614364-20151025012513/@comment-27036118-20151025022041

I think that it doesn't open until the Neutral Route, but it might be possible to access it after the fight with (slight spoiler) Mettaton EX. You get this phone call that triggers the events that lead to the True Lab opening, but I'm not entirely sure whether you have to have beaten the Neutral Route once or not for it to occur.