>>22622512But it let you get pokemon!
Seriously though the thing was night useless and, like many parts of HG/SS, served to increase the tedium.
Hell, you can't get anything decent until you unlock the higher up courses which takes forever, then you have to walk at least 10000 steps to unlock better moves and rarer pokemon. On top of that there's only a small chance of encountering the rarer pokemon, you only gain one level per trip and the items you get are pointless.
It's like a shit, physical version of the dexnav.