i guess NES style would be more original since the black/white does still look quite similar to the gameboy 4 color pokemon games.

The pokemons on the NES screenshot are really hard to read, it looks a bit like you just put them into an resize without interpolation. I know it is hard to work with this little amount of pixel but i guess i have to try to focus on certain aspects of the pokemon (head, feet, arms) and make them be recognizable as such.

yes the rocks for the second one look better, although i think the first one was ok as well (i only don't like the "moss" around the tile). I think the first one has a slightly better color palette (second one lacks a bit saturation)

But overall - judging just by a single tile - it doesn't look bad. But what is quite important for tiles/games is how it looks when repeated and/or ingame. How do the edges merge into each other? Sometimes you'll want some kind of variation for it to not look too repetitive.

Hey, these look quite good already.
The outside tileset is rather dark without any really bright colors (or is it supposed to be night?)
The dungeon looks dark as well but there it is ok.

this looks awesome!

but there is a sub board for offering/seeking for work: https://pixelation.org/index.php?board=6.0