After registering Pandora’s Tower I received this notification:

This was a nice little surprise seeing as it wasn’t advertised at all.  If the coins are the same quality as the Super Mario 25th anniversary coin then this will be a nice addition for any collector.

Update: http://www.nintendo.co.uk have now added a full story on this:

13^th April – Qualify to receive the Club Nintendo RPG Commemorative Coin Collection by entering a new Club Nintendo promotion linked to the action RPGs Pandora’s Tower, Xenoblade Chronicles and The Last Story. Pandora’s Tower is the latest in a series of action-packed RPGs to come from Nintendo, and launches across Europe today, exclusively on Wii, coming hot on the heels of previous RPGs Xenoblade Chronicles and The Last Story.

To be in with a chance of receiving the Club Nintendo RPG Commemorative Coin Collection, which features three collectible limited edition golden coins, featuring designs based on the worlds of Xenoblade Chronicles, The Last Story and Pandora’s Tower,  all you have to do is register all three games on Club Nintendo. The coins are limited edition and will only be available while stocks last!