To edit and hack the narc files, you need to have the NarcExplorer 2.
NarcExplorer 2
Type: Miscellaneous
Compatible with: Pokemon Diamond, Pearl, Platinum, Heart Gold, Soul Silver, Black, White
Supported OS: Windows
Download Pokemon GB GBC GBA NDS Hack Tools
NitroExplorer 3 is the advanced version of NitroExplorer 2 – the tool that can extract and edit ARM9 with various overlays.
Nintendo Pokemon ROM Editor (NPRE for short) is a strong tool for editing and hacking any Pokemon ROM on the NDS system.
Honey Tree Pokemon Editor is used when you want to change the Pokemon come from the honey tree in Pokemon games.
BTX Editor is a tool to edit the BTX (texture) files used in the overworld sprites of NDS Pokemon games.
Nothing change with the functions of DPP Attack Editor, a tool for editing Pokemon’s attacks in game.