The Evatchi, also known as the Multipurpose Egg Shaped Decisive Weapon Evatchi is a licensed Tamagotchi Nano model based on the anime series Neon Genesis Evangelion.

Special Governmental Agency NERV has developed the technology to apply retroversion on Angels, forcing them into their embryonic state to be raised in egg-shaped containers filled with L.C.L. The egg-shaped armored containers are built to restrain Angel from its rampage and allow people to carry them outside of the organization’s laboratory. As a member of NERV, you have been assigned to raise the Angels using the ‘Evatchi’, and based on how you handle various events, the Angel will grow into various forms. Attend to any instances of L.C.L. corruption and break through all generated A.T. Fields!