i didn't even understand the purpose of the museum in the original game? was there?

I haven't tried this, but this looks very nice.

How much is left to finish approximately?

Thanks

Mostly items, but a few other small things(some buildings aren't finished, and there's no dialogue or anything yet)

Yes for items, but the only unfinished buildings are the Museum (and it would be useless as FinaleTi said) and Celadon's shop, but I don't know what to put here other than a regular shop, or a bigger regular shop
As for dialogues, it would waste space in the executable . I would only do them if Axe supported multipages apps with only data on secondary pages.

Out of curiosity, how dificult would it be to change the battle system to only use the arrow keys and the 2nd key, instead of using the number pad for part of it and the arrow keys for another part?

That wouldn't be difficult but all the battle code is recycled from my previous Pokemon project in basic and I first wanted the engine to work before making it better

Something I just noticed. Critical hit displays a message, but doesn't seem to affect the damage done

Lol, I just checked and it is an epic fail from my part. I put instructions in the wrong order, like

get attack force→K
If critical hit
   display things
   health-K→health
   K*1.5→K
   .those two need to be exchanged
Else
   display things
   health-K→health
End

Yes, it will be easy to fix

Erm...

UPDATE
Note that I didn't write "update" in red but in blue. This because this is not my work but Zero44's (I don't know why he didn't posted it himself by the way ).
Now you can send your Pokemons from a calc to another
See the "Link" folder in the zip.

(Nothing changed in my prog, no need to update it if you have the previous version, only care about the Link progs).

Also, if Zero44 could post here so he can get +1s...
(and if someone knows how to make a multicalc screenshot... o.o°)

edit: the download count is false: I already downloaded it three times to test

So this update allows trading pokemon between calculators?

Well, not the usual ZPKMN program. You must run the prog in the Link folder to do so, but yes, now you can trade Pokemon between two calcs