Preservation website Helix Chamber has re-scanned and restored several pages from the original Pokémon pitch presented by series co-creators Satoshi Tajiri and Ken Sugimori back in 1990. The documents consist of concept art, sprite designs and map layouts, including some ideas that were ultimately scrapped, as well as others that eventually made it into the final product. To check out the full set of design documents from Helix Chamber, click here.
Source: Gamasutra.com