I know he drew the original 151 Pokemon by himself, but the gen 5 designs are totally different and crappy. Did he make those too?
As an example, while the original 151 were personally designed and drawn by Sugimori, by 2010 and Pokémon Black & White he was leading a large art team, who all worked on creating new creatures for the game. Despite this, Sugimori had the final say on designs, and all final character art was still his sole responsibility, maintaining a tradition that has seen every piece of official Pokémon creature and character art come straight from Sugimori's pen (or computer).
Source: http://kotaku.com/5804919/the-man-who-creates-pokemon-for-a-living/ Hope I helped!