>>33683687Not really. ORAS covers those legendaries already with 3+ IVs. I could see Articuno, Zapdos, and Moltres though. Make them easier to obtain than XY's of bird depending on starter.
Soaring allowed GF to fit all the legendaries easily. Something like Underground could allow GF to fit legendaries into DP remakes if they do something like "Deep Underground." That could fit things like Kyogre, Groudon, Reshiram, Zekrom, Kyurem, Yveltal, etc.