https://tcrf.net/User:Incineroar/Prerelease:_Pokémon_Diamond_and_Pearl>I've been shown some assets from the game as well that seem to correlate with early graphics, including a non-standard Dawn sprite that doesn't match the sprite style the game usesThink Ganix showed this dude screenshots of the D/P beta? It'd fit with the different Lucas sprite we were shown.
Also, beta Barry's got a weird hairstyle.