The "unfinished-looking" artwork for the first- and second-generation Pokémon is the original Sugimori art. For the third-generation games he adopted a new art style and eventually remade every Pokémon in that style. Most Pokémon only have one Sugimori art; those that have alternates are usually Pokémon that have been redrawn for covers or advertising for later games that feature them heavily, e.g. the Emerald versions of the R/S starters.