The upper-right corner of the water ridge is water. It looks like it should be brown.
"And a TOWN MAP
and a handy FAME CHECKER" is displayed twice in a row. It shows this text once, then a blank text box, then the same text is displayed again.
This may be a little picky on my part, but the trees above the upper most ridge and above ASH look strange. It's like they're grown into the ridge.
As you can see, the staircase looks kinda weird when you walk under it...
I think it would sound better if there was a comma before and after JACK. So it would read, ...My son, JACK, has already...
After you wake up from your sleep, if you 'talk' to your tv, then it still says there's a live pokemon match going on. Same thing with the tv downstairs. So I would suggest changing it to another script after you wake up.
When you try and move up one tile you can't.
NON-PICTURE BUGS:
1) When the rock seller guy, or Brock's dad, starts speaking, the line is indented. (Unlike your other scripts).
2) The guy in Viridian Forrest who battles you and says he battled the other Pallet Town trainers doesn't say anything when you go into his cabin. All he does is heal your pokemon without any text.