If you like Mario's companion Yoshi, you should definitely look at his gallery: Nishi is a dedicated Yoshi artist, drawing all kind of Yoshi-like characters. Not only that, but also his comics are definitely worth a second look, being fully coloured and shaded, without looking too glossy or distracting, something that one misses in many other comics. Also, in addition to be a friendly and kind person, he is one of the very first persons I met on deviantArt, and probably one of the most patient ones.
Further personalities Nishi draws do not only include a raccoon and dogs, but also more exotic characters such as a goat - giving his gallery and drawings a warm look and a nice variety of different characters to look at.