Just thought I'd pop in here since I did the translation on which you're basing it, and I put that alphabet in there. You're not quite right on that last screenshot: the tile for number 0 is at $622DA, so you need to go to that tile and push + until you've got it there.
I could give you a zip file with my work if it helps? I should point out that there is compression in the game which I had to reverse engineer, and I don't know if you will need to deal with that (I did this over 2 years ago).
Here's a map that I made of the ROM contents:
CRAYON SHIN CHAN GG
661 Checks compression type (see below)
136D Screen location for "Push Start" 1
1374 Screen location for "Push Start" 2
F1A0 Graphics "Shin-chan/Masao-kun Wins"
26C61 Tilemaps for game mode graphics
2CBE0 Mini-game title graphics
2EC4E Tilemaps for mini-game title graphics
4D3FC Start of "Omake" graphics (compressed)
4DD87 Start of compression table
4E073 Story Mode text
55286 Toy Hunt sign graphics
5C2B8 Story Mode font (compressed)
60294 Graphics "Push Start (compressed)
60A88 Start of title graphics (0000-1FFF, compressed)
614D7 Start of compression table (0000-1FFF)
6151D Start of title graphics (2000+, compressed)
61DE7 Start of compression table (2000+)
622DA Mini-game font
642DC Mini-game text
66C00 Quantum Battle graphics
68950 Graphics "Push Button 2"
I also wrote a lot about how the graphics compression works, but I won't put that in the thread right now since it's probably overkill at this point.