The Tibetan Pug is not a purebred dog. It is a cross between the
Pug and the
Tibetan Spaniel.
The best way to determine the temperament of a mixed breed is to look up all
breeds in the cross and know you can get any combination of any of the
characteristics found in either breed.
Not all of these designer hybrid dogs being bred are 50%
purebred to 50% purebred. It is very common for breeders to breed
multi-generation crosses.

"Harley (Male) is a Pug x Tibetan
Spaniel. He is 15 months old in this picture and is a beautiful, friendly and
happy dog. He is very intelligent and knows how to play his owners :). I guess
we just give in to his Big Brown Eyes & Friendly Nature. Harley loves the water
and socializing, but hates when we leave the house without him. He is only just
getting used to us going to work, where he won’t race to the door to try and get
out. Hahaha! He knows when he has done something wrong; he starts to run around
the house a million miles an hour. He is a very good watch dog, stands tall and
proud. He is a true gift of God. :) "

"Our little baby Rooney, a Tibetan
Spaniel/Pug mix at 4 months old. Rooney is a rascal... getting into
everything. He definitely has a stubborn streak where he speed-runs around
the house when he gets scolded... ha,ha! He loves people and puts on the
charm whenever he sees someone while on walks. He is a joy and we are so
glad to have chosen him to join our family."

Rooney, the Tibetan Pug (Tibetan Spaniel / Pug Hybrid)
puppy at 4 months old