When Jimmy showed obvious disgust over his friends hanging out with Hannah, and referring to her as the "baby", Katie's words just solidify how the three have grown: "She's not a baby! She's alright!"
Orson's face coupled by this line: "Hannah!"
At the end, Scary Godmother and Hannah go on a broomstick riding lesson around Scary's house, and later the entire Fright Side.
Daryl calling Max and Ruby "so cool".
Jimmy asking Hannah if she can help him break the candy-filled pumpkin.
Hannah's character development between the two films is a mixture of this and a Moment of Awesome. She started the first movie as a naive, easily frightened kid, but by the time the second movie starts she chats happily with Scary Godmother and Bug-A-Boo, and clearly loves Halloween enough to save the day by using her creativity to work around Jimmy's desire to ban it.