go to your PC and click on the one you don't want and press release.
go to release
Go to the Pokemon center and in the PC select a Pokemon and click release
Click new game at the menu
The only way to delete moves is through the Move Deleter, which should be in Blackthorn City.
unless you have the TM or are making another eggbthen no
you can't i tried trust me. if you did delete your saved file and you had a Pokemon in the walker it will be there until the battery dies get a new one.
like Pokemon soulsilver and heartgold, you press down on the control pad, the select button and then b button.
You have to go to the title screen (it has HO-OH for HeartGold, LUGIA for SoulSilver) and press Up, Select, and the B button at the same time. Then a message will pop up asking if you want to delete your game.
Up, Select, B at the main menu the same goes for Soul Silver.
At The Starting Screen (When Your Looking At Ho-Oh Flying) Press UP+SELECT+B And It Will Ask If You Would Like To Delete Saved File
There is no best Pokemon on Pokemon HeartGold.
there is no Pokemon Mansion in Heartgold.