Now this is cool, graffiti done right is always awesome to look at! The characters really pop out from the background, great job on color choices there! Those bricks and stairs are really making me jealous, they look just perfect!
I drew the image in pencil on paper, scanned it, then rendered everything on layers in Photoshop using my Intuos tablet as well as the pen tool for sharper curves and lines. Hope that helps, glad you liked it!
The first thing I would like to point out is how unique your artwork is with the video game like concept with the characters and the setting, as well as how it is laid out in a grafitti like fashion, very interesting! Like I said before your work is super unique and I encourage you to stay with this style as it is fun to look at as well as I do not seem any artwork presented like this, which is a good thing! Like a breath of fresh air ahah good work!