This is a fanart of a videogame character that came out back in 2004 on the GameBoy Advance. So far I haven't seen a 3d representation of this character, only 2d fanart. Very cool character design by Ryoma Itoh. 

My process was making a front drawing with the new proportions, made a base mesh in 3ds Max, then exported them to Zbrush to make the highpoly mesh. Did the retopology in Topogun. After that baked it in Marmoset and handpainted it most in Photoshop. Some details were done in Substance painter. 

Here's the link to the artstation site where you can see a Marmoset Toolbag 3d view. https://www.artstation.com/artwork/R3dWvv