How to get Yellow Pikmin
The yellow Pikmin are actually given to you quite early in Pikmin 3 Deluxe. You get some of these to use in the prologue, but they're removed and don't come back until much later. You fully unlock the Yellow Pikmin once you get to the Distant Tundra, but it won't be for a little while, so some patience might be needed. We'll explain it in more detail, but if you're trying to avoid spoilers, now's the time to stop. You'll ultimately get a Yellow Pikmin just for playing the Countryside, so if you haven't made it to the remote tundra, know that you haven't missed a thing.
For everyone else, getting to the Distant Tundra involves completing the first section of the game. You must complete the Garden of Hope section, including defeating Armored Mawdad. Once you've done that you'll get the Data Glutton item which will unlock the new area of Distant Tundra for you to explore. All you have to do to get the yellow Pikmin is go for it and the game will take care of the rest. You will be lost in a cave and the Yellow Pikmin and their onion are there for you to get and use.
What a Yellow Pikmin font
Why do you want these little guys? As the game shows you, they are immune to electricity and even conduct it between themselves. This is the key to a lot of things in Pikmin 3 Deluxe. You'll use yellow Pikmin to attack electrified walls, fences, and enemies, and can link them to connect electrical wires to power different things. Additionally, Yellow Pikmin fly higher when you throw them, making them ideal for taking out any floating or flying enemies if you don't want to risk your Winged Pikmin. And lastly, the Yellow Pikmin are able to deal with bomb rocks while others usually set them off.
So they are really important and useful. Hope you now know how to get yellow Pikmin and what do they do in Pikmin 3 Deluxe.