Go into your computer to Bill's PC, and then to "Move Pokemon". When you click on the box, one of the options should be to rename it.
Try this link if you have action replay: {It may or may not help but it is the best i can do to help! [FYI THIS IS NOT MY VIDEO>>>]} www.youtube.com/watch?v=iJx3WCTdvwY
There is no best Pokemon on Pokemon HeartGold.
there is no Pokemon Mansion in Heartgold.
They are not in Pokemon HeartGold
Go into your computer to Bill's PC, and then to "Move Pokemon". When you click on the box, one of the options should be to rename it.
In Goldenrod city, there is a tent where the name rater is. Talk to him to rename your Pokemon. However, you cannot change the names of any Pokemon you have traded in or migrated from another game. You can purchase an Action Replay DS / DSi/ 3DS and change any Pokemon name even if its not your Pokemon under your Trainer ID.
You should be able to rename a Pokemon any number of times in the game.
Try this link if you have action replay: {It may or may not help but it is the best i can do to help! [FYI THIS IS NOT MY VIDEO>>>]} www.youtube.com/watch?v=iJx3WCTdvwY
There is no best Pokemon on Pokemon HeartGold.
there is no Pokemon Mansion in Heartgold.
They are not in Pokemon HeartGold
In slateport city there is a name rater who can rename your Pokemon remember Pokemon traded to you can't be renamed.
You can rename pokemon when you first obtain them or ask the Name Rater to change it. The Name Rater is in Lavendar Town he's in a house below the Pokemon Center. Bring the pokemon you want to rename to the Name Rater then he will let you rename it. Keep in mind pokemon obtained through trade cannot 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.
where is the pokemon transfer lab in heartgold
No, but you can trade Pokemon only in HeartGold to Black