https://wotlk.ezhead.org/?item=32233
https://wotlk.ezhead.org/?npc=22943 должен быть невидим для остальных, его могут видеть только пьяные игроки, или находясь пати/рейде с вами
https://www.wowhead....nglish-comments
The Wolpertinger is a ficticious animal that only the player sees while drunk. If you have full screen glow effects on, the Wolpertinger will appear only as a blurry fuzzball, making the player seem as if they are "seeing things." This is why other players cannot see it.
I can confirm that, while it is invisible to others, anyone in a group with you in either a party or raid can see it.