The second one is the best. I like the text. First one...the render isn't blended enough, and text is just weird. The third one has too much negative space, isn't blended, and is too plain overall. Haha I like your bulbasaur one though. Although you should get rid of some of the negative space.
I Have to agree. ^ Second is the best, First doesn't look blended enough. And the third... His hair looks very... Sharp.