Amazon offers Prime members the Pokémon Battle Ready Pikachu, model no. T18207B, for $14.89 $14.28 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.61.) That's the lowest total price we could find by $4. Pikachu launches foam discs either off your shoulder or a flat surface such as a tabletop.

Orders placed by December 22 are guaranteed to arrive in time for Christmas via Prime shipping.