Your story is set in the kingdom of toys, and the adventure starts when the king summons you. He explains his frustration at having only one Pikachu. In contrast, a mysterious magician has captured several Pokemon! So the king asks you to show that magician a thing or two by collecting lots more Pokemon, and he lends you his Pikachu to get you started on your adventures. Depart from the castle town via a hot-air balloon to get to different areas where wild Toy Pokemon await!
You, along with your Personal Mii, will collect Pokémon through thrilling gameplay, challenging stages and by collecting essential items. Every existing Legendary Pokémon can be discovered and collected, with Mega-Evolving Pokémon joining the battles. Plus, your Adventure Rank will increase the more Pokémon you collect.
Not only Pokémon appear in Pokémon Rumble World. Your Mii character appears, as well as the Mii characters of players you pass, leading to adventures for Pokémon and Mii characters together. You can enable this mode by connecting your Nintendo 3DS or 2DS system to the internet and also activating StreetPass. Then Mii characters from near and far are able to visit one another’s games and provide mutual support in future battles.