I made this pokeball and it is powered by and Arduino Uno. Inside it had an RGB LED and vibrating disk motor. I printed an electronics box to house the Arduino. The top of the box has a patch of grass covering it that was 3d printed. The box has holes for both the usb connection and power adapter connection, it also has hole for a button switch so you could program it to run on a switch. The light is a constant white and then pulses red then wobbles as if you had just caught one. The button was printed seperatley in clear PLA. I designed a hinge and latch on my secone iteration of the ball which make it close a lot tighter than in the picture.

Enjoy.