I don't know what sparked Chuckie/Angelica! I used to obsess over that show, and I was watching it since I was three/four years old, but I never thought about shipping with the characters. It was really kinda cute in my dream. They were ... four to five years old, I'm guessing? Somehow they begrudgingly worked together on ... some childish adventure or another at Tommy's house, then realized they had a crush on each other. And I think Angelica kissed Chuckie on the cheek. The details are fuzzy, but I remember the kiss.