I'm pretty sure Regenerator Ho-Oh only comes in Dream ball since its a pokeradar pokémon. Shiny Mew and Deoxys is a bit fishy as well. I dunno if you have gotten these legends of GTS or something, but if you don't know who RNG'd them I wouldn't trade them if I were you.
Hm. I honestly dont know which mons are hacked or not from these legendaries :/. I didnt really own gen 4 or 5 and only recently started playing pokemon again. If these are hacked please let me know. I will promptly remove themI know that your thread says no hacks, but I think many of your legendaries are hacked ones. I even have the same exact mew.