Go to Crystal Villa, she is always there.
Well, the legendary Pokemon in this hack are: Victini, Zekrom, Reshiram, Kyurem(With white and Black form), Keldeo, Genesect, Latios, Latias, Entei, Suicune, Raikou, Celebi, Deoxys, Darkrai, Cressidia, Mew, Mewtwo(With Y mega form), Shaymin and Giratina.
It is a problem, but I'm not sure if I can do it better...
Also, where's the stupid ancient sword? :l
Use dig near the wall in the end of the cave, and it will be opened. Eliza is a Zoroark, it is not a legendary Pokemon. You can find the sword in a cave of Waterwave Path.
At this moment I've caught
Mew, Celebi, Shaymin, Cresselia, Deoxys, Latios, Genesect, Darkrai, Reshiram, Keldeo, Suicune, Entei, Raikou, Kyurem, and TWO Giratina! Still missing Arceus and Eliza, where are they by the way? Are there anything else I missed out?
Arceus is on Azure Hall, you can get there from the entrance of Mt.Skywall in Marble City, but you need Azure Flute firstly, it can be found somewhere in Central Area. You can get a silver sword in an underground cave on Waterwave Path.
Yes, because I expanded the rom before.
More than these, You can find the mega form of Absol and the X mega form of Mewtwo.