Pokemon Heart Gold
Official Site

Compatible with any Nintendo DS™/DS Lite™

Release date: Sep. 12, 2009
Genre: RPG
Version: NTSC-Japanese

Features:
Heart Gold and Soul Silver are available updated various functions of the series,
also added new elements for the featuring for latest Pokemon series!
The stage is based on "Johto region", which appears for the first time in DS.

Since pokemon first series have been released in 1999 in the world,
more than 2,300 million sales has been recorded.
The Pokemon Gold and Silver comes here for the first time in a decade!
 

Some of the streets in Johto region:

Package come with "PokeWalker"

PokeWalker is　pedometer that is bundled with a remake.
As you walk around with it in hand, the device converts your foot steps
into "watts" that can be used to catch wild Pokemon and search and get tools
using "dancing machine", then it's possible to send back to
the main Heart Gold, Soul Silver software.

PokeWalker Specifications.

• Batteries: one button battery (CR2032)
• Weight: about 21g (including battery) 
• Body Dimensions: Diameter 48mm Thickness 13.9mm (not including key top) 
• Supports infrared communication 
• With a pedometer 
• Bundled with Pokemon Heart Gold and Soul Silver