BUMPING
Just remembered this site:
CLICK ME!
It has lots and lots of Sprite Sheets of classic and old 2D games.
This resource is useful if you want to get an idea on how to animate your sprites.
I use it all the time.
And once again... for 2D Sprites you better go with GIMP 2.8.22 and be sure to set up your grid, and snapping on, and use the PENCIL TOOL and use SMALL CANVAS SIZES like 64x64, 128x128, 256x256, 512x512, etc.
Remember, if you have a question regarding your software, give me a message on my profile or through private message and I'll try to help you out.
I've been using GIMP for 4 years now almost everyday and Inkscape for 2 years.