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Ulysses21
Since: Mar, 2015
2017-04-07 07:03:29
The closest I could find is that these types of things tend to come under the relevant seasonal trope of Halloween Episode, Christmas Episode, Thanksgiving Episode, or Valentine's Day Episode. There's also Halloween Cosplay, although unfortunately not a Seasonal Cosplay super-trope.
Edited by Ulysses21
jormis29
Since: Mar, 2012

...describes an instance in which the entire character line-up is dressed up in different costumes for a limited time, such as Halloween? Or maybe just changing the costumes in general. For example, the video game Cookie Run has every Cookie dress up in a unique costume for Halloween. http://cookierun.wikia.com/wiki/Halloween_Party
Sorry if my wording sounds bad; usually I tend to express what I want to say badly. .~.