No, Deoxys is only in Emerald, and you need to migrate it to can catch it. As for Celebi and Mew, you need a cheat code for them.
the code is.... 01564203780137241372486120734576241573945007652016121086400000000004300007461232473537412372412337895218794 32186314565416510740858748097019807840984510000x the x is where u put m= mew, c= celebi, d= deoxys not been tested
Mew
jirachi i got him maybbe celebi as if you have it you can get mew
you want the hack Pokemon go get action replay
No
you have to trade them over
I only have Mew. You get it by clicking L+R in front of the Mining Museum in Oreburgh. Mew: 94000130 FCFF0000 B21C4D28 00000000 B0000004 00000000 10001170 00000097 D2000000 00000000
mew appears randomly from pokeballs, as well as celebi. has no affect
u can migrate from a gba game or trade.im willing to trade a mew for a celebi.
no they are not i no i thought they were at first not but they not related
I wish you could because i really wanna catch celebi, mew, deoxys, and jarachi and arcues