The name raters is located in Goldenrod City in Johto (in a house north of the railway lines) and Lavender Town in Kanto (a small house next to the southern path into town).
Inside there will be only one person, a man wearing a hat. Talk to him and if you can change the Pokemon's name (you cannot if it is a traded Pokemon) the Name Rater will say "that's a fairly decent name" and will suggest he should call it something better. Say "yes" and you will be able to enter a new name.
Chat with our AI personalities
if you wanna change your name make a new pokemon crystal or go on settings
In Pokemon Crystal.
What the hell is a Pokemon crystal
You can't get Moltres in Pokemon Crystal, Only in Pokemon Leafgreen and Pokemon Firered. Including Pokemon Platinum.
There is np VS. Seeker in Pokemon Crystal.