How to move all files but X to Y

Question

It doesn't really matter if it's in the terminal or if it's a applescript but I need to know how to:
Move all files in a dictionary but a few named.

Answer 1

Could you pleas explain more?
If you do not understand the shell while loop, it is possible that using shell commands is a bit more dangerous than you might want to try.
The explanation:
ls -a | grep -v "X" | while read file
do
    mv "$file" "Y/"
done
ls -a will list all the files in the current working directory (including the invisible files that start with a leading period.  Thinking about this, maybe you do not want to include -a.  You could cd /path/to/the/desired/directory as a way to set your current working directory as the directory you wish to move things from
cd "/path/of/the/from/directory"
ls | grep -v "X" | while read file
do
    mv "$file" "Y/"
done
The ls command's output is piped (the vertical bar | ) into the grep command (general regular expression parser).  The -v option tells grep to throw away any lines (filenames) that match the regular expression "X".  So if the regular expression X matches all the files you do not want to move, the filenames send to the next pipe will be the files you wish to move.
The while loop will read the filenames grep has selected and invoke the mv (move) command for each file selected by grep and move them to the destination directory Y
The bigest risk is that you will execute this in the wrong directory and move the files that you need somewhere else.  OR WORSE, if "Y" is NOT a directory, and you DO NOT put a trailing / the mv could move easy file to the destination file, deleting the previous file for each file moved, so effectively deleting every file in the directory except the last one.
This is why I said if you do not understand what is going on with the shell commands, you could do damage to your system.
ls could have the /path/of/the/from/directory instead of using the cd command.  The grep command could be replaced with egrep that allows using alternate matching strings:
ls /path/of/the/from/directory | egrep -v "abc.txt|def.jpg|xyz.mp3|etc..." | while read file
do
    mv "$file" "/path/to/the/destination/directory/"  # notice the trailing slash for safety
done
Good luck.  I hope you do not destroy your system