mirror room stage

could anyone share me the link of this stage please

That looks like a training room stage with some added effects.
Other than that I can't provide any information about this stage.

Do you happen to have any more info?
Where did you get the image from?
Was "Mirror Room" the actual name of this stage?
Do you know the author's name?
An approximate date it was released or last talked about?

Any of this information you can provide will assist in getting the results you want form the request

It s a link promoting batman tas in mugenfreeforall
Only this info