Go ahead, Pikachu. What stem?

Go Pikachu is a network term. It turned out to be Xiao Zhi, the hero of the Japanese anime Bao Mengke. When Pikachu was called out, it has now become a daily joke.

Source:

Go Pikachu, a network term, comes from Xiao Zhi, the protagonist of Bao Mengke, calling Pikachu out, and later evolved into a daily joke, meaning "Go!" .

Usage example:

Used for joking every day. Generally, when others are leaving, you can say humorously, "Go!" For example, if you happen to chat with a friend, and he says you have to go to work first, you can say, "Go ahead, Pikachu!" "