how can i make a 2d characther for a metroidvania and what software i must use
i seen characther made with spriterr but look hard for me 
thanks in advance
You can use any software. Spriter is good if your graphics are good and want to make complex and good looking animations.
If you stay 8- or 16-bit (like in nes or snes games) graphics, any program is good. Example Gimp is quite good.