Nickname?

[mr.BLK]

Can I change the nickname of a pokemon if I didn't give it one originally?

 

[Pikamiki]

yes if you didn't trade it, just visit the name rater and you can change the name

 

[Swampert fan]

Name rater is in a Slateport city-

 

[Xtra]

And in Emerald, he'll appear on a TV and talk about the nickname you gave your pokemon.

 

[9voltdude]

go to the name rater, it will work if it hasnt been traded

 

[mr.BLK]

I its traded from my Leaf green to my emerald, if I trade back can i change it?

 

[DarkSpectrum]

If you trade it back to its original trainer/game then yes you can rename it because when you do that it doesn't act as if it was ever traded

 

[Fiery Blaziken]

If you caught it in that game, then yes.