Angelica tried to warn the Merlinical Council in front of Lord Evilton, but no one believed her and she was sent to Mount Krushmore.
Later, she was trapped in an hourglass, whose sand nearly buried her alive. Headmaster Greystash tried to help her while fighting Malicious Krubb. Krubb told him that if he saved Angelica, he would die. Greystash decided to save her, but Krubb's magic then hit and killed him.
In Bart's fantasy, Angelica stood against Krubb. They changed their wands to boxing gloves and fought each other, with Krubb winning.
In the movie series, Angelica looks different than in the books series. The gryphon in her coat of arms is facing right not left and she wears two tortoise shell barrettes in her hair.
It is not sure whether Angelica is a wizard or not. In Angelica Button and The Dragon King's Trundle Bed she wasn't, however, when Lisa wore her costume, she was holding a wand, so it is possible that Angelica later discovered that she is a wizard.