Well I dunno if this would work or not, Theres this program “Lunar Expand” that helps expanding the ROM sizes. You could get more space with it. Yet I’m not sure if I’m talking the same thing as you since I don’t know anything about script bytes or rom hacking.

http://fusoya.eludevisibility.org/le/index.html

Green grass looks kind of bad. It would be nice if you could recolour it to White.

Also don’t pile enemies in just 1 area of the map, try mixing them in the whole area. Example:
Bandits: Map 1-2-4
Shy Guys: Map 2-3-4
Another enemie Map 3-4
Or something like that :P

Well, if you look at MRPG Map names, the names are more a description than the zone’s name, such as Mushroom pass, Booster Pass, Thief Way, Rose way. Soo I dunno. Snow path? Frost road? If you want a more a name for the zone… Snowlake (If its a lake), Shiver Peaks… Uhh dunno, I’m [...]

I liked Kuribo Shoe. I would have liked that Kuribo shoe aleast jump 1 tile higher to access other areas.

Rose Way: >With the Kuribo Shoe you can also skip Bowser Event, tho is less important and harder to do. Rose Town: >Uhhh When I talked to a guy behind a house, he asked me “Have you seen the Mushrooms in the Forest” I said no, and everything started turning black slowly (And the text [...]

Found another one. This one is really weird. I was messing around in mushroom kingdom with the Kuribo’s shoe after I had completed booster pass. I went in the basement of the shop and jumped up the stairs. When I reached the main floor, all of a sudden Mushroom Kingdom was under attack by Mack [...]

This is actually a bug from the original game, not the hack. I use it whenever I do a Level 3 run. The Kuribo’s shoe just makes it easier.
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Ooh didn’t know that… Still that doesnt mean he can’t fix it (but maybe he just can’t).

Well this is all I have found so far, most are kinda obvious but I still listed them: Bowser Keep: > First room, when the Goombas follow you, if they hit a statue, they freeze. Mushroom Pass: > Dunno but I feel Healing items are dropped too frecuently. Mushroom Kingdom: > When you talk most [...]