Pets are another way of enjoying raiding in WoW, plus it also gives you a companion. The pets play on your behalf and save you some effort. Each pet comes with unique characteristics but not each is easily accessible. Having some pets is also a way of showing off your collectibles.
However, some pets are the rarest, and by having them, you add value to your profile. Gaining these pets is tiresome and time-consuming; however, it is worth it. There are specific locations where these pets are found, and it is also challenging to tame them.
So if you also need a pet who can accompany you and help you, here are some rarest pets you can try your luck for.
Sabertrons
You will find Sabertron in the Battle for Azeroth while exploring Stormsong Valley. The pet can be tamed using mechanical taming. These days players are not spending much time in Azeroth as they used to. Hence it is easy to find this pet and tame it.
To make your pet work, you must tame it first, and no one else should damage it. This is because the pet is extremely rare to respawn and is available in only one color.
Players can use the Sepulcher of the First Ones heroic boost and let the professionals run for them. They run for the Shadowlands Mythic+ Dungeon, after which you can have items from 236-262 ilvl. You also get a chance to have Conduits and many other things.
Elegon, The Spirit Dragon
This one can be seen in shadowlands while exploring Pandaria. You need to use a spirit-based taming once you have found it in the Mogu'Shan Vaults Raid zone. When the player sweats in Pandaria and faces the boss, this gives him a chance to obtain this new and rare pet.
Only when you are Beast Mastery Hunters can you tame Elegon as it doesn't accept the same as Cloud Serpents.
The Argus Duskcloak Panthera
This one is available in the Legion expansion when you are in the Argus zone. To tame this pet, you need to use Fresh Talbuk Meat, and there you can teach it moves. This one is only available in Argus, for which you can have a drop called Talbuk Meat; however, the drop is rare. Once you have the drop, you may find Panthera in Krokuun.
There should be no other player to interfere with taming. You have to use the Meat correctly and should not have aggro, or the taming process will fail.

Skarr and Karkin Duo
These pets come as a duo available in Cataclysm expansion when you explore the zones Molten Front and Fireplume Peak. For taming, interrupt spells work, and to see them respawn, you have to wait for 12 hours.
Skarr is the panther, and Karkin is the crab that you will be fascinated to have. To wait for the spawn, you need to be at Fireplume Peak and find a spawn point. These pets cast spells that come in the way of taming. So, you first need to silence them before beginning taming.
The Lightning Paw
This one you can obtain in Legion while experiencing the Vanilla content. You will have the posibility to obtain the mighty beast in the Duskwood zone. This one can be controlled when you are Beast Mastery spec. Since the beast is stealthed all the time, this serves to the rarity; even rarer than other pets and beasts here.
However, this blue fox can spawn anywhere in the Duskwood, mostly in bushes. If you have a mount to fly, you can easily locate this one even from a distance. Since it is a Spirit beast, you need to be a Beast Mastery Hunter.
The Beautiful Gara
Gara can be found in the Warlords of Draenor expansion when you are in the Shadowmoon Valley. The pet needs a questline to get tamed, and it is possible when you haveBeast Mastery spec.
The problem is that the questline is complex, making lots of efforts to control Gara. You will have to kill many elites and become face to face with Void Lord Xan and other enemies. However, if you dare to do it, Gara will be the most beautiful pet of yours.