Oh heck, I guess I'll post.
My number one bud, my life-long companion, my heart of hearts, is the one and only Tetsusaiga. I tamed him a bajillion years ago in Vanilla. Back then, I was ignorant and when I saw his picture online somewhere (it was love at first sight, let me tell you), mistakenly believed he was a rare spawn. I looked him up and everything, knew where to go, and so I sat there. And sat there. I finally decided to try to find out more about him, then found out he was a Horde-only quest spawn. Crap.
My brother, bless his heart, went to go make a Horde character, level it up, and do that quest for me so that I could get Echeyakee. I waited patiently for a while, then an undead dude came trotting up. I assumed it was my brother, and the fellow summoned Echeyakee and emoted (can't remember whether it was /cheer or /point or /yes or what...it's been a long time), so I tamed him. Inu Yasha was probably my favorite show back then, so it seemed only natural that I name this beautiful white lion with the poofy mane (and gorgeous eyes) Tetsusaiga, since he kind of reminded me of the tuft of fur on the blade of the same name. That, and I saw him as something of a fierce and beautiful weapon.
I don't remember if I called my brother or if he called me, but in any case I went to thank him for helping me, and he replied that that wasn't him. So yeah, some random Horde guy took pity on me and summoned Echeyakee for me so I could tame him. I may not remember his name, but I will always remember his kindness.
I am ashamed to admit that there was a time in WotLK that I needed stable space. There were shinies to be had! I foolishly believed that I could release Tetsusaiga and tame him again later. His loss didn't hit me right away, as I was playing with the new toys. However, that feeling of dread and loneliness began to sink in. I missed him, BAD.
I tried taming Sian-Rotam, as I had written a story that I had released Tetsusaiga out there to start his own pride. I tamed him, but it just wasn't him. I tamed Echeyakee again, but he was lifeless this time, as if he were only a shell of his true self. I was devastated, truly. I know it's just a pixellated animal in a game, but I was heartbroken. I tried to move on. A little while later, I tried taming Echeyakee again. Still nothing. This white lion was just a white lion. Hope was lost, or so I thought.
Finally, I read a couple stories on here about people asking for their pets to be restored and having their request granted. It was a long shot. Tetsusaiga was an old, old mob, and I had recently tamed an Echeyakee and named it the same thing. I wasn't sure if they'd be able to help. I gave them all the details I could - his level when released, the approximate time frame; I even went so far as to notice on WoW's armory that pets loaded or tamed after the armory went live had lower ID numbers in their URL than newer pets, so I used that knowledge to try to help them even more.
Imagine my sheer shock, surprise, and elation when I logged on one day to a lovely mail from a GM, and Tetsusaiga - the REAL Tetsusaiga (or "Tetsusaiga the Elder" as the GM called him) - waiting for me. Writing this brings tears to my eyes. I vowed that from that day on, he will NEVER leave my side ever again. Other pets may come and go, but Tetsusaiga is part of what makes WoW, WoW to me. We've tanked old Zul'Farrak, devilsaurs (back in Vanilla when they were freaking terrifying); we've chomped Horde; seen new zones together; been through every expansion..... Even if I put this game down never to be played again, I will know that I ended it with my best friend at my side. Never have I grown so completely attached to something in a game. I love Tetsusaiga (fudge, now I actually am crying,

).
Sadly, I lost a lot of my pics when I got the new computer, so I'll attach what I have and try not to spam too much. XD
(A re-tamed Echeyakee would have been 82, since they leveled to three below us at the time - the original Tetsusaiga was released at level 80.)
