As part of its ongoing efforts to promote every single Pokémon out there, The Pokémon Company has shared special content dedicated to Kadabra:
Did you know? It stares at a silver spoon to amplify its psychic powers before it lets loose. Apparently, gold spoons are no good. It possesses strong mental capabilities, but its psychic powers are halved when it’s not holding a silver spoon.
Source: The Pokémon Company
Source: Pokemon