Requirements:

• PC
• USB A to A cable
• Magisk
• SafetyNet Fix

Steps:

1. Connect your ATV to your network, get its IP address, enable USB debugging and toggle USB0 debug interface
2. adb connect <ip address>:5555
3. adb -s <ip address> install ./Magisk-v25.2.apk
4. adb -s <ip address> reboot
5. adb -s <ip address> shell "echo 'dd if=/dev/block/by-name/boot of=/sdcard/Download/boot.img' | su"
6. adb -s <ip address> shell "echo 'dd if=/dev/block/by-name/vbmeta of=/sdcard/Download/vbmeta.img' | su"
7. Open Magisk on the ATV, patch /sdcard/Download/boot.img - take note of the filename, specifically the end of it
8. adb -s <ip address> pull /sdcard/Download/magisk_patched-25200_<end of filename>.img
9. adb -s <ip address> pull /sdcard/Download/vbmeta.img
10. adb -s <ip address> pull /system/xbin/su
11. `adb -s shell
12. su
13. mount -o remount,rw /
14. rm /system/xbin/su
15. reboot recovery
16. On Windows, open Powershell as admin, on Linux, open a root shell or run the following commands as root
17. fastboot devices should show your ATV
18. fastboot flash boot magisk_patched-25200_<end of filename>.img
19. fastboot --disable-verity --disable-verification flash vbmeta vbmeta.img
20. fastboot reboot
21. adb -s <ip address> push safetynet-fix-v2.4.0-MOD_2.0.zip
22. adb connect <ip address>
23. adb -s <ip address> shell
24. su and grant root permissions using the remote
25. cd /data/local/tmp
26. magisk --install-module ./safetynet-fix-v2.4.0-MOD_2.0.zip
27. Open Magisk on the ATV, enable Zygdisk, enforce blocklist, add Google Play Services to the list.

Now install any apps and other modules you might need such as Exeggcute/GC, Pokémod Atlas, eMagisk, Pokemon Go, etc.