MEGA MAN STAR FORCE REFERENCE
The Transer (heh) [...] is a mobile terminal that appears in Mega Man Star Force as an evolution of the PErsonal Terminal from the Mega Man Battle Network series. Most people wear their Transers on their arms[, but it can also be detached from the wriststrap].
The Transer is just a wearable Nintendo DS in form, because that's the platform the game is on, and instead of apps, you insert different physical cards, as the battle system has card game elements. Gimmick-based worldbuilding.
Coincidentally, it was released in Japan in December of 2006.
They added a general disclaimer that some dialogue is inappropriate for modern times and not representative of Capcom's current values. Some examples, courtesy of the ESRB:
There's nothing visual going on, it's just "spicy" dialogue, but I support their decision to add a disclaimer. But merely acknowledging this is too much for these people...