Cowboy Bill I believe.
I saw a video clip of a GIANT mascot open its mouth and then the cheerleader jumped in.
A company called Custom Characters in Burbank, CA.
The Dallas Stars don't have a mascot.
The mascot is the person who dresses up as the team's symbol (ex: tiger, indian, bear, etc.) The cheerleader is the one who cheers and pumps up the crowd on the sidelines during games and at pep rallies. The mascot is essentially a cheerleader, but doesn't participate in quite as much in competitions and such.
Cowboy Joe is the name of the Wyoming Cowboys mascot.
Mascot or cheerleader