There are one issue of wikia: Downloading image file name was called image.png or image.jpg (using download manager)

comments was not allowed to post, i don't know why solution is.

nope, until mediawiki will fix that solution. that's all

The Example is on aikatsu wikia, see the Template:Switch/doc for this link: http://aikatsu.wikia.com/wiki/Template:Switch/doc

Here's the example the result for switch template. For example: The image will changed to Season 2.