Ah I see. I might have the evolved forms of some pokes if you're too lazy to train/evolve them xD
Also, I have Y, so I can give you the entry for Yveltal.
If you don't mind doing some trades, I can provide some dex entries of evolved stuff if you want.
Also here's a little tip: Get a castfrom (which i can provide you with if needed), breed it a couple of times put it in GTS and ask for stuff you're missing. Castform gets traded like..really fast and within minutes as most other people ask the most ridiculous stuff for it on GTS ^^
If you need the entries, I can trade them back and forth so you have them in your Dex.
I'll let you keep the Regi's, Cresselia and Palkia so you can trade those on GTS for some others ^^
You don't need ALL legendaries for the National Dex. The event ones don't count for it: Deoxys/Manaphy/Arceus/Celebi/Mew/Jirachi/Darkrai/Shaymin/Keldeo/Meloetta/Genesect
Ahw sucks man D: That almost happened to me 3 times, but all 3 times the shiny one survived the unlucky magnitude and they other geodudes didn't use any more magnitude's luckily :0