Aesthetically, it doesn't look half bad, however I have to comment on some oddities and gameplay concerns that I have:
gameplay wise, you can get through this map by just walking in an upwards line for a few seconds. I don't see any grass that would maybe force you to change direction... maybe having some trainers lurk around the path that leads north would make this more fun to wade through.
Forcing the player change direction every once in a while should make the map more enjoyable to play through
Does this map have a connection to the right? You can surf to the east of this map by sticking close to the ground wall. Was this intentional? If there's nothing to the east of this map, you will have border problems in game in the surfing area close to the mountain walls.
The ground wall near you after you leave the pier shows a squarish ground tile as background - this is easily fixable with the Block Editor in a-map if you're using that
If you want to be 100% in line with Nintendo style of mapping, you have to do the tree-to-tree shading correctly, everywhere. Below is a pic where you have used the right tile (blue line) and where you have used the wrong tile (red line)
Here's my map:
hack of emerald
is there a secret under that bridge?! I'll never tell
I wanted to add shadows under the large trees on the pavement but I literally run out of both tileset and blockset space, there's just not a single tile to use there
the roads of this city are made to be travelled with the Mach Bike (so they're intentionally long-winded)
Credits: Kyledove, WesleyFG, Alistair, Alucus, Zein, Zelix, Zeikaro, Zeikku, Zeo254, Novus, Zeo254, TheRedEx, EVoLiNa, Phyromatical, Dewitty, Magiscarf, PeekyChew, Zerudez, ShoddyBattle, Cuddlesthefatcat, Hydrargirium, zetavares852, digibody, Davias, spaceemotion, Newtiteuf, Ozumas, Xiros, Aten974, Warpas, speedialga, saurav, newtiteuf, Stormlugia, Zusammenstellung, thegreatblaid, ~Trebuh~, JesusCarrasco, Gallanty, seiyouh