Originally Posted by 0danmaster0
What I find weird is that groudon (グラードン), phione (フィオネ) and zekrom (ゼクロム) are listed here aswell as zygarde (ジガルデ). I wonder why they are randomly listed
It's almost definitely a ban list, likely for the Battle Maison. Or, possibly, a list of what is considered "Special Pokemon" for things like the GTS.
List of special move Pokemon found in the Pokewalker