But lets not get sidetracked. The moral issue of catching animals, forcing them to live inside little balls and occasionally fight one another is for another day. I'm just here to tell you how to make one.
This is a relatively quick and cheap way to make a pokéball, either as a prop, or to store stuff in (pikachu statues). The actual making time was 2-3 hours of solid work. It's not as easy as it looks and if I had two or three days to do it, it probably would have turned out a lot better.
I'm not liable for any injuries caused making this project. I'm paranoid, OK?
If anything isn't clear, just leave a commment and I'll sort it out. Sorry for the blurry photos, it was dark by the time I'd finished and my camera's not brilliant. Also sorry for the quality of the build, I was under pressure to finish it (I did it in about five hours, including getting the materials.
Step 1: Materials
Materials I used (substitute in whatever you need to)
2 Cardboard eggs
Some kind of black plastic (flexible, but not too much)
2 Washers (one slightly smaller than the other)
Red and white paint
Small amount of (duct) tape
For the electronics
10(ish) really bright LEDs
Push to Break switch
Resistor (Calculate it for your specific LEDs here )
Step 2: Cutting and painting the eggs
Cut along your line with your knife. Don't cut yourself! Once you've cut both eggs, straighten up the edges.
Time to paint! Paint one half red and the other half white. Try to use even brushstrokes all going the same way to make it look neat.
Step 3: The Black strip
You need a strip of your black plastic that is enough to make a circle with a diameter just smaller than the hemisphere.Glue this around the edge of your white hemisphere.
You will also need a circle of the same plastic that is just larger than your big washer. We'll use this later.
Step 4: Glue and paint the washers
Step 5: Cut the circles
Now glue the black circle to the red hemisphere, and the 'button' on the black circle. With hindsight, I probably didn't need a semicircle cut out of the red hemisphere, I could have just glued the circle on top.
Step 6: Hinge it
You could just use normal hinges and attach them in a different way, but I didn't have much time.
Step 7: Electronics (optional)
Now put tape around all the exposed wires (we don't want any short-circuits). Put the circuit into the pokéball and glue all of the LEDs in the places you want. Tape down the battery because you might want to change that sometime.
Glue the push to break just behind the rim of the pokéball in a place where, if the ball is closed, it will be pushing down the button. You could glue it at the front, at the sides or even at the back but make sure that when it's closed, the button is pushed down.
The electronics make it so that, when the ball is closed, the lights are off, and when it's open, they're on, creating the effect of you sending out your pokémon!
You could solder in an SPST (on/off) switch in to make sure that if the ball accidently opens, you don't waste all the battery.
Step 8: Finished!
Some kind of spring release mechanism with a button that triggers it where the button on the actual pokéball is.