Humphrey and Kate have to cross a ravine with a raging river below. They accomplish this by swinging themselves across. Doubly so in that Humphrey had to let Kate bite his tail to get her across and managed to support both of them despite the very noticeable pain.
The crowning moment of Garth and Lilly's development as a Beta Couple is when she manages to get him to howl beautifully after he's spent most of the film with a terrible howl.
Humphrey and Kate manage to put his logboarding skills to effective use. First, it's to escape vicious bears. And then later on, it's to save Winston and Tony from the caribou stampede.
Kate and Garth calling off the wedding ceremony to declare how they truly feel about Humphrey and Lilly despite Tony's threat of war
During said stampede, Tony finally manages to work up the strength despite his cracked disc and film-spanning antagonism to aid Winston in scaring off the caribou from trampling Humphrey and Kate.
Alpha and Omega 2: A Howl-iday Adventure
Runt manages this in two regards. Firstly, despite being held hostage by the ominous Rogues, Runt manages to stay mostly courageous (with Princess' help) and even insultsKing with the knowledge that the wolf could kill him at any moment. And then, he proves that his ability to climb trees isn't so weird or wrong when it allows him to find his family shelter from the snowstorm.
After seeing the bears of the first film try to kill Kate and Humphrey, it's awesome to see the bears get organized by a bear cub Humphrey and Kate help to defeat and drive away the Rogues in the sequel.
Four Rogues corner Garth and mock him for "marrying a weak Omega". Lilly proves she's just the opposite when she takes them out with a log.