Full Hat Pikachu Secret Language Summary (continuously updated)
Eight kinds of hats come from Xiao Zhi (idiot), the protagonist in the eight-generation animation. The fourth Pikachu code word was released this week.
All Pikachu secrets published so far:
First generation no printing: P 1KACHUGET
I am sure it is you: 1CH00SEY0U.
Super generation: P 1KAADVANCE
Diamonds and pearls: V0LTTACKLEP 1KA