Go to the Name Rater in one of the cities.
You can rename a pokemon by going to the Name rater
You should be able to rename a Pokemon any number of times in the game.
There is a name rater in Castelia city. In a building just go on the street diectly east of the Pokemon center
Go find cecilia and click on change poke'mon name and change it. only on REPEREDS^ mode.
In slateport city there is a name rater who can rename your Pokemon remember Pokemon traded to you can't be renamed.
In Eterna city where the second (grass type) gym is, go into the apartment block and on one of the floors there is an old man who will rename your Pokemon. He will not rename Pokemon that you got in a trade though.
The Name Rater will rename any of YOUR Pokemon. If you own a Pokemon that originally belonged to someone else (Like the Machop you trade for in Goldenrod), then he wont rename it.
no.
you can't
Go to the namerater in Lavender Town or rename it right after you catch it.
lavender town
In Eterna City, (the town with the second gym) beside the Pokemon shop, there is a building, go in and talk to the old looking man, then he will let you rename your Pokemon.