Hey this is really nice even if it is incomplete! That lucario especially looks awesome!
As for the whole motivation thing, I haven't really posted a lot of art here but I have been creating a lot of art and motivation has been something that has wildly fluctuated for me the past. I think the thing about having motivation/inspiration/whatever to do art is that it hardly ever comes to you naturally, oooor at least for me anyway. Often times I have to make myself be motivated to draw something by just sitting down and starting some warm up sketches that will hopefully lead me to draw
