I think the Overridden Excavationbot is a cool looking item. He is like the daddy of the Pet Bombling companion Pet.
You get this guy from Box of Overridden Excavationbots and it cost 120 Lion’s Landing Commission.
You purchase the box from Ongrom Black Tooth (Horde) and Proveditor Grantley (Alliance) both located in Krasarang Wilds.
You can summon him to fight by your side, but only in Krasarang Wilds. I really don’t know if he is any good in a fight though. I never used him to fight. I just ran around with him and my pet bombling for fun.
I didn’t get a very good pic of him so below is one I found on Wowhead.