Universal Remotes: Which codes can I use to operate my Apple TV 4?

The Apple TV 4 supports Apple TV remotes from previous generations as well, for which the setup codes 2615 and 1115 have been created.

Should the Apple TV not respond with the above mentioned codes, the TV4 also has the capability to learn commands from a remote.
This way, you can setup the One For All remote for usage. Please refer to the documentation of your Apple TV 4 for instructions.