Can anyone help with a multi-region unlock code for the Panasonic DMR-EZ25.

Cheers.

Try a google search.
You might find its against terms and conditions to post hacks on here.

The codes to make Panasonic units multi region are not transmittable by the normal Panasonic remote.

You can hire remotes which will transmit the correct code at places like HERE.

Hope that helps.