Can someone write a walkthrough on how to make your own wondermail thing?

Are you like some sort of imbecile? No offense but wonder mail codes are for Pokemon Blue/Red Rescue Team only.

You can't make wondermail on FireRed or LeafGreen. Wondermail is only for Red Rescue Team(GBA) and Blue Rescue Team (DS). Hope I Helped!

Sure, just go get the right game and you can play with Wonder Mail all day long-there's already walkthroughs and people who will make you wonder mail codes and sites you can make your own, if you even need your own as there's about a million out there already!
I'm trying to be nice, but you are either really confused or posted accidentally to FR instead of RED Rescue Team-Wonder Mail is only for Pokemon Mystery Dungeon-both Red and Blue can use them pretty much the same way, but not in FireRed-sorry pal! It seems to good to be true though, huh? Well I guess you'll need to get the right game or post over there, but you could just look around at the different sections for PMD to get what you want most likely-I wouldn't post the same question there though, since I did answer it already and anything you'd need in the beginning of that game is already posted about a million times over-just look around in the Red and Blue Sections-you'll be overwhelmed with Wonder Mail codes you won't even need or be able to use yet anyway. Get into the game & then worry about Wonder Mail codes-they're not going anywhere and they multiply like rabbits, it seems with everyone posting codes! Good luck-hope to see you over in PMD-Blue as that's where I usually am answering stuff, be happy to help when you figure it out, OK.