While he's definitely curious as to just what, exactly, this apparent grievance entails, now is neither the time nor the place to ask, even if Ho-Oh were inclined to answer. Instead, Sion's reminded of the news reports he saw earlier...

"I don't know if you'll find this useful, but apparently, Lugia has presumably been located somewhere in the Seafoam Islands. At the very least, Articuno, Zapdos, and Moltres have been seeing coming and going from the area, carrying berries and such things into the islands."