How Can I Get A Marshmallow Styled Notification Shade/Panel?

[Dankees]

Hi, how can I go about getting my notification shade to look like it does in Marshmallow?

 

[Rukbat]

By flashing Marshmallow firmware to the phone. There's no "notification" app, it's part of the system.

 

[Dankees]

Thanks.

There's no way to change the notification panel theme to an older style?