What are the monsters and ghosts in Halloween themes in Western countries?

Halloween (or Halloween 'en, abbreviation for "All Hallows' Evening"), also known as Halloween, on October 31 every year, refers to the eve of All Hallows's Day. It is called "Christmas Eve" similar to Christmas Eve. It is a traditional festival of the Catholic Church and is mainly popular in English-speaking areas such as North America and the British Isles, followed by Australia and New Zealand. That night, children would put on makeup clothes and masks and go door-to-door to collect candy. A major Mass was held the next day to commemorate the saints.