ROM Hacking Tools
When I first joined the hacking community, I was unsure of what tools to use. Below is a catalog of EVERYTHING you need, If something good comes out, I'll add it to the list. I have never hacked .gb, .gbc and .NDS so I have no idea of the right tools to use. If you are experienced in hacking any of these, please give me a list of all the tool needed for that generation.

Advanced Series	GBA	Pokemon	Edit a Pokemon's Sprite, Position and Party Icon	Download
YAPE (Yet Another Pokemon Editor)	GBA	Pokemon	Edit all details of a Pokemon	Download
Pokemon Editor Pro	GBA	Pokemon	Similar to YAPE	Download
Evolution Editor	GBA	Pokemon	Edit a Pokemon's Evolution	Download
Egg Move Editor	GBA	Pokemon	Edit a Pokemon's known egg moves	Download
Learnable TM Editor	GBA	Pokemon	Edit a Pokemon's learnable TM list	Download
A-Tack	GBA	Pokemon	Edit Attacks	Download
PokeCry	GBA	Pokemon	Edit a Pokemon's cry	Download
NSE (Nameless Sprite Editor)	GBA	Images	Edit nearly any image in the game	Download
APE (Advance Palette Editor)	GBA	Images	Edit the palette of any image in the game	Download
Item Image Editor	GBA	Images	Edit the image offset of items	Download
Item Manager	GBA	Scripting	Edit details on Items	Download
Advance Map (1.95)	GBA	Mapping	Edit the places in the game	Download
Elite Map	GBA	General	Includes many useful programs such as UnLZ	Download
XSE (eXtreme Script Editor)	GBA	Scripting	Edit Scripts in the game	Download
Sappy + MID2AGB	GBA	Music	Edit or Insert music into the game	Download
A-Text	GBA	Scripting	Edit the text in the game	Download
Berry Name Editor	GBA	Scripting	Edit Berry names	Download
TSCC (Title Screen Cry Changer)	GBA	Scripting	Edit the Title Screen Cry	Download
Shinyzer	GBA	Scripting	Allows Shiny Pokemon to be used in scripts	Download
Pokedex Order Editor	GBA	Scripting	Allows the user to swap around pokemon in the pokedex	Download
DNS (Day, Night, Seasons)	GBA	Scripting	Allows implementation of Day, Night and Seasons	Download
Free Space Finder	GBA	Scripting	Finds free space in ROMs so you may store things	Download
Misc. Editor	GBA	Scripting	Edits a couple of little things	Download
NTME	GBA	Images	Allows to create tilesets (.RAWs)	Download
A-Mart	GBA	Scripting	Edit prices of items and what's avaliable in Marts	Download
A-Starter	GBA	Scripting	Edit the pokemon you start with	Download
Trader Advanced	GBA	Scripting	Edit the trades avaliable in the game	Download