Just downloaded Pokemon Rumble World from the Nintendo E-Shop yesterday. You get to pick one of your Mii's to represent you in the game. With the original Rumble Blast you just controlled Toy Pokemon. Your Mii helps your Toy Pokemon on adventures. You get to use these hot air balloons to travel to various stages where you defeat other Toy Pokemon and get a chance to capture them. All Pokemon from Kanto through Kalos are available in Rumble World~
There are microtransactions (Paying in a free game to get stuff)
In this case you can pay real money for diamonds which allow you to get balloons for traveling to the various stages. The hot air balloons are 1 time buys because they can be reused over and over again. However each balloon needs time to reinflate which can take up to 30 min. real time up to 8 hours depending on the size of the balloon. This can be sped up through the diamonds you can get with real cash.
Other than the microtransactions the game is fun~ The microtransactions are avoidable though but you just have to wait patiently.