Strakk rides a goblin trike, which is also a trike-in-a-box (same concept as Town-in-a-box). He can unbox and rebox the trike when he needs to. He also has a hot air balloon and a sea-faring ship by the name of Profit III. Strakk has a large number of Spy Squirrels at his disposal, which are robotic squirrels that he created. Their primary use is to spy in various popular locations and gather intel for Strakk with their cameras and recorders, often listening for key words and phrases. Strakk can also use them to communicate with people over long distances. They have upgrades which allow them to hide, and they can all teleport and take objects with them (but they can't take anything alive that is bigger than a small bug). Some have special functions beyond spying, like cut 'em up squirrel, catch 'em squirrel, mega battle squirrel, cooker squirrel, pilot squirrels, happy times squirrel, pool pony squirrel, and DANGER pool pony squirrel.
Hectur can summon a Deathcharger and an undead gryphon from the Shadowlands. He's taken to naming the latter James. Hectur is the self-declared queen of a hive of undead wasps from draenor. Hectur has a Cinder Pup given to him by Invar, which he named Kitty and never uses. He has a robotic spy bird which was also given to him by Invar which he also never uses. Hectur can also bring forth groups of corpses to fight for him. He also summoned an undead hawk named Kwah, but has only used it once.
Kalaanar has a horse named Speed. He considers himself to be a top-tier horseback rider, but is very unadaptable when it comes to riding other mounts (like that Rp when he tried to ride a raptor in draenor).
Rastath rides a felsaber which he can summon.
Clorg's mount is also his hunter pet, a worg named Ashfur he received when he started training as a hunter.
Truzzak has a raptor that he received before becoming a druid. He doesn't ride it as much anymore now that he's a druid who can fly.
Yongo's mount is a large turtle named Pu.
"Profit, profit, profit. A word so nice, you say it thrice." - Strakk Crashgear
Viktoria (Velikaya) is often riding her favorite goat, Carrot. Carrot is a white goat from Pandaria, which Viktoria enjoys feeding carrots. Viktoria also sometimes uses her Imp as a sort of butler/thing getter. Often he is forced to wear a little, Imp Sized apron.
Thelmia doesn't really use a mount or has a companion.