Yes, Oogie Boogie Bash is a "separately ticketed event," which means a standard daytime admission ticket to Disney California Adventure or a Magic Key pass will not grant you entry to the party. This special Halloween-themed event takes place exclusively at Disney California Adventure Park on select nights in September and October. Because it is a "private" party, the park closes early to the general public (usually around 6:00 PM), and only those with the specific Oogie Boogie Bash wristband are allowed to stay and enjoy the exclusive entertainment. The event features unique character meet-and-greets, "Treat Trails" where guests can collect candy, a special parade, and immersive decor that isn't available during normal operating hours. Tickets for this bash are notorious for selling out within hours of being released, often months in advance. Guests with an event ticket are usually allowed to enter the park a few hours before the party officially starts (a "mix-in" period), but for the rest of the day, you would need a regular park ticket if you wanted to experience the park before the festivities begin.