The game is Way better then the first. Pokemon Rumble Blast has a great story. With most of the Pokemon this game has more than the original ever offered. Pokemon Rumble Blast is the Perfect to any Pokemon Fan
This game is like a Saturday Night Live sketch. Some Pokemon Spin-offs are awful, some are decent, and there are very few AMAZING ones. We are still yet to have an amazing spin-off. Pokemon Rumble Blast is fun yet a bit tedious. Like past games, you go in to different type related areas and recruit defeated toy Pokemon. This mechanic is very fun, don't get me wrong, but it can get overdone very quickly. You can indeed find all 649 Pokemon, but many of them feel the same. That's this game's problem; there's no depth anywhere here. Many things are so shallow. It's worth renting, but not worth the $30.00 fund to keep it.
You actually can delete the past renter's file. Just open up the game from the 3DS home menu holding ABYX. Hold it until the actual title screen pops up with a message asking you to delete data. Have fun.