This is a replica of the key that Serena (and other contestants) use during the Pokémon Showcase events as an accessory and a way to measure the amount of votes received.
In this video, you can see how it was made, and an alternate version of the key, which features leds shining in a fading effect: https://www.youtube.com/watch?v=1_bskG5WBVI
FlashForge Creator Pro 2016
This item is printed in three parts: The main body is divided into two halves that can be printed independently without the need of supports. Afterwards, they need to be glued together.
The heart-shaped jewel requires supports. After the print is finished, it should fit into the key by applying a little pressure.
Mechatronics engineer. My side-quest involves making my own videogame!