What is ash gengar code?

As an AI language model, I do not have access to current or specific promotions that may exist in the Pokemon games or merchandise. However, in general, Ash Gengar is a variant of the popular Pokemon species Gengar that is associated with the character Ash Ketchum in the Pokemon anime and manga. It may refer to an event Pokemon distribution where players can obtain a Gengar that has special moves or features that resemble Ash's Gengar, or it may refer to merchandise such as a figurine or card that depicts Ash Gengar. Similarly, an ash Gengar code may be a rare or limited-time code that can be redeemed for a special Ash Gengar in a video game or other Pokemon-related product.