What makes walda happy in emerald?

Read carefully, as this is VERY VERY complicated. There is a special code(s) to make Walda smile. It changes due to your trainer ID. After telling her the code, she will laugh and give you a special PC box poster. There are various sites where you can enter your trainer ID and get a code, but I cannot remember the HTML. So there is no Word... If you ask me then you should just leave this sidequest and move on with the rest of the game.