TheWoWDB
This rare, together with Abesha (The Snowbringer) is very difficult to find and is only spawned as a "rare event" (quoting GM).
This might be interpreted as a rare world quest spawn, however there are currently no sources linked to such world quest currently existing in-game.
Doing Adventurer of Highmountain, I contacted a GM in order to figure out where to find these, and this has been confirmed - http://i.imgur.com/rsRZKYN.png
Rare
Bruiser
Champion Chomper
Bruiser (Champion Chomper) is a Rare Beast of the Basilisk family, level 10 to 45, hostile to players.
Details
Bruiser at a Glance
What does Bruiser do?
Rare spawnRare
Level and Map Tracking
The game data tunes Bruiser for levels 10 to 45, Legion content.
In the Client Files
Standing toward playersHostile
Files
Background
Art © Blizzard Entertainment. Fan reference, not affiliated.
Hunter Pet: Basilisk
Bruiser belongs to the Basilisk creature family, which Hunters can tame; its pet specialization is Cunning. The Basilisk diet in the client data: Meat and Fish. The Basilisk family’s own pet skill line (Pet - Basilisk) teaches 2 abilities:
More Basilisk
Other creatures in the Basilisk family. See the whole family.
The highest voted Wowhead comments for this page. They are community notes, not TheWoWDB comments.
Not in there as of live
Might be like Oubdob, and only up when there's a world quest for his death.
Community notes from Wowhead · 12 comments
Top 3 shown aboveThe comments below were written by Wowhead users. They are community notes, not TheWoWDB comments. See them in context on Wowhead.
The top 3 are shown in Top Comments above. Read all 12 on Wowhead.
Game Data
Creature ID102863
Display ID66850
Faction template14
Content tuning333