Here are the pre-release images from Pokemon Rumble U. Click the thumbnail to view the picture:

February 15th 2013
Battling against a swarm of Pikachu
 		 Teaming with other players to take on Groudon
 		 Battling in an arena
 		 Getting backed into a corner
 		 VS Eeveelutions
 		 VS Marill
 
Selecting Pokémon
 		 VS Results
 		 New toys come in a capsule, not letting you see what you earned til completion
 		 Selecting Pokémon
 		 Teaming with other players to take on Groudon
 		 Checking your score
 
The toystore
 
March 15th 2013
Pikachu, Snivy, Tepig & Oshawott are lost
 		 Part of the overworld
 		 Battling Chandelure
 		 Chandelure Appears
 		 Scanning a Figure
 		 The Pikachu figure is scanned in
 
Entering an area
 		 A timed challenge
 		 Defending the flag
 		 Attacking hoards via the Touch Screen
 		 Finding an item
 		 Using an item
 
Using an item
 		 Firing a cannon
 		 Firing a cannon
 		 A Spiked Ball
 		 Collecting coins
 		 Teaching a NFC Pokémon some moves
 
Teaching a NFC Pokémon some moves
 		 Teaching a NFC Pokémon some moves
 		 Saving the upgrades
 		 A Standard Pikachu and a Figure Pikachu compared
 		 Keldeo Appears
 
April 15th 2013

 
 
 
 
 
 

 
 
 
 
 
 

 
 
 		 Scanning an IC Card spawned Mesprit
 		 Purchasing a new ability
 		 Kyurem appears