Avid Pokemon Trainers will tell you that sometimes an ordinary Pokeball just won't cut it. Sure it will work on a Pidgey or a Charmander, but you'll need to have a dozen or so handy if you want to catch some of the harder to find Pokemon.
The Slingshot Channel's Jorg Sprave might not know much about Pokemon, or even apps for that matter, but he knows how to make a slingshot, and one that is capable of capturing just about any type of Pokemon.
After figuring out what he was supposed to be shooting at, Sprave took some wood, a drill, some spray paint, and a few bungie cords, and crafted the red behemoth that you see in the video. The Pikachu Hunter Pumpgun 1400 as it's so accurately called has a magazine that can hold up to 14 Pokeballs. The top chamber is for holding the Pokeballs, while the bottom chamber is for firing them. He also included an iPhone 6+ as an aiming device, with the phone's camera in line with the barrel.
To fire it, you'll need to pump it first, then once its pumped you hit the switch above the trigger area, which releases a Pokeball into the bottom shooting chamber. After that, just hit the trigger to launch a Pokeball.
While it took him a few tries to grab a Pikachu, he did successfully hit him, though with all the explosive powder in the Pokeball, actually catching him was pretty much out of the question. RIP Pikachu.
You can view more of his work on his official Youtube channel.