The almost-ending to "The Search for Sandy's Brother". After finding her brother (who is hiding at this point) Sandy walks in on the other Ham-Hams and looks around, having no clue why everyone's been avoiding her and a bit upset about it, and Maxwell walks out the crowd and begins directing everyone as they sing a remix of the song her brother sang to her, and was key in finding him. At the end she even tears up and whispers "It's my song..."
The end of "Keeping Promises". When everything is finally cleared up, Hamtaro asks Boss to forgive him for breaking his promise for the two of them to help Bijou out. Boss then tells that he will, but only if he forgives him for getting upset and over exaggerating Bijou's fall ending with a Man Hug.
In "The Scary Museum", Boss saves Bijou from a clocktower with a ball cannon. She's very grateful to him and says he reminds her of the brave warrior Perseus. Boss blushes profusely at this.