I am in desperate need of a Banana Costume and I need a Costume shop but I don't know of any. I live in Luzern so I would be willing to go as far as Zurich to find one. Any help would be appreciated

I didn't realize it was April 1st already ! Try this.

or this (found googling): www.butinette.ch - search the site for "banane"

There are quite a few costume shops in Luzern, they seem to survive only for Faschnacht.

I seem to remember there was one on Baselstrasse, I think it's near kasernernplatz (forgive spelling)