No, at least not according to what I've heard, and I've never found a way except deleting my entire save file.
There is a building next to the POKeMART in Eterna City. Talk to the old man at the table in there and he'll rate your nickname and/or let you name or rename it.
anything you want
You can rename a pokemon by going to the Name rater
The wild yellow hair friend in the game; he's in the introduction of the game.
sorry...i don't think there is one
Your rival.
It matters what starter you choose
There is a building next to the POKeMART in Eterna City. Talk to the old man at the table in there and he'll rate your nickname and/or let you name or rename it.
You only have one rival (or do you mean the second time you battle your rival?)
Rival
he gives you $6400!
anything you want
you talk 2 your rival and she/he gives you one
there is no such thing as the name deleter but there is a person in eterna who will rename your Pokemon and in canalave there is the move deleter.
your rival will have one and so will you. A trainer will have the last one.
mainly its your rival inpokemon platinum but Cynthia on Pokemon diamond and pearl
Zoey is the girl from the Diamond/Pearl tv show who becomes Dawn's rival. She is a Pokemon coordinator at the Pokemon contests. Zoey is not in the games, however.