This Extreme Leopard Pattern has been a special color available in the Design A Horse program. It first appeared in 2010 as a special color for Equilocity that year. To my knowledge, that has been the only offering. The original price to add this color was $150 and no other color choices were available, nor any pattern options, but you could add socks and face markings, striped hooves, eye color and choice of matte or glossy finish. This pattern was not available on Chips.
An updated version of this pattern was available starting in 2015.