As of February 2015, there is no game called Monkey Quest 2 released yet on the market. The original Monkey Quest game was officially closed on Sept. 26, 2014, and any player accounts remaining on the game are no longer accessible.
The mobile game connected to Monkey Quest, which is called the Monkey Quest Thunderbow, was removed from the App Store on July 31, 2014. Any players who had purchased a paid membership would have received a refund. Prior to its closing, players were also able to spend NickCash in the game, and are still able to spend it on the Neopets game.