...and no one has any idea what it means.
http://www.nintendoworldreport.com/news/29642
The name "Pokémon Tretta" has been trademarked by Nintendo, GameFreak, and Creatures.
The trademark itself (number T2012-14319) has not been given meaning yet, though a logo was included with the trademark. In Japan, the word "tretta" usually refers to something bookshelf or bicycle related, but with an English logo being given alongside a Japanese one, whatever the trademark refers to will likely come to the west in some form.
'Pokémon Tretta' Trademarked by Nintendo
...and no one has any idea what it means.
In Japan, the word "tretta" usually refers to something bookshelf or bicycle related,