New to modding

Hello all,

I've just bought a 3ds and while I'm waiting for it to come I wanted to ask what sort of things I need for modding.

I'm mainly looking to transfer all pokemon and zelda games I can into my 3ds XL.

I also want to put cheats onto the pokemon games one at a time, as I won't play them all at the same time.

Is there anything in particular I need to research or buy for this type of stuff before my 3ds comes?