[DrillBIT]

Kamen Rider Battleride War theme song "Go Get 'em" (by Kamen Rider Girls) first press comes with product code for unlocking DLC "Kamen Rider Wizard All Dragon figure", which comes with experience up skill.
(Playable characters will be able to equip with figures to get extra abilities)
http://www.ladyeve.net/archives/008325.php
Amazon page

I think there will be other products which comes with different product codes as well.