Pok�mon Rumble World is the fourth game in the Pok�mon Rumble spin-off series. This game is available on the Nintendo 3DS and is a free to play title where you can recover your Pok�mon using Pok�Diamonds which you can find in game, earn via StreetPass or purchase in the in-game store.

In this game, you play as your Mii as he helps a king find various Pok�mon toys to collect Pok�mon to show off against a magician who lives nearby who has more than the king.

To play the game, you have to select an area by using a special hot air balloon. This costs a variety of Jewels, base being around 10 with it likely getting higher as you get further in. Then, when you select the area, you get a roulette of several stages to pick. Sometimes, stages are visited by rare Pok�mon and this is indicated by stars on the roulette. As you collect more Pok�mon, your adventure rank increases, and more wild Pok�mon start to appear. When you use a balloon, you have to wait for it to reflate before you can use that specific balloon, or you can use Pok�Diamonds to speed it up. You can also spend Pok�Diamonds to get various bonuses such as an increase in the amount of Pok�mon you can have and boosts in strength
When you StreetPass a player, you get a special mission where you have to protect their Mii from a wild Pok�mon attack. When you do, they will appear in stages and give you a bonus: Attack Support, which boosts Attack, Defense Support which boosts Defense, Speed Support which boosts your Pok�mon's Speed and Recovery Support which will heal you.

You have the ability to purchase Pok�Diamonds in the game to speed up your progress, but you can only buy up to 3000 Pok� Diamonds. Once you have reached that limit, the game stops you making any further purchases and gives you the opportunity to purchase VIP cards with some Pok� Diamonds which allow for cheaper balloon inflation.