Either it's a legendary with some plot relevance (hoping not, I wanna hoard them) or a new mechanic is involved. Sky Battles might be relevant given the load of Flying/Levitate Pokémon models which aren't grounded.
Still wondering why people are calling Hitotsuki by its localised French name.
Because it is easier to remember and type.
Pull List(trades in quote)-Hawkguy, Young Avengers, X-Men Legacy, FF, Cable and X-Force, GA, Larfleeze, Red Lanterns, JL 3000, Saga, and Quantum and Woody