It's basically an empty post people make to keep track of a thread. The word "tagging/tagged" was traditionally used to meet minimum character counts for a forum post. It's just easier to keep up with a thread if you're reminded of it.
They try to keep us out with a wall. Their walls are always weak. It's very sad, no class. We'll tear it down and build a better wall. A tough, solid wall. The best wall. And they'll pay for it, trust me. Nintendo loves me.
You're kidding right? Smash, all the Pokemons and MK are three of the most popular series on the console. Sun/Moon is barely 6 months old - this will effect a lot of people.