A hidden feature in these Pokémon games is the ability to tell a certain NPC four specific words or phrases using the easy chat system in order to unlock special rewards. Which words are required are unique per save file.
In Diamond, Pearl, and Platinum these rewards include 8 different special PC box wallpapers. The NPC to speak to is located on the 3rd floor of the Jubilife TV station.
In HeartGold and SoulSilver, rewards include 8 different PC box wallpapers plus 3 different Pokémon eggs. The NPC to speak to is located in the Violet City Pokémon Center.

The original distribution of these passwords was via the Pokémon Daisuki Club, a defunct, Japanese-exclusive official fan club website.
Below is both a calculator to generate the passwords for your specific save file, an in-depth explanation of how the password check system functions, and a full dump of the relevant word data.
Japanese Train Drive Sim2 (often referred to in lifestyle and entertainment contexts by its technical Japanese title suffix "OneMan2") is a highly immersive simulation game developed by HAKOT, specifically designed for rail enthusiasts and fans of "Cool Japan" culture.
The 3D art style is a deliberate blend of hyper-realism for train interiors and soft, almost watercolor textures for character models. Lighting is key: the harsh fluorescents of the morning commute, the golden glow of sunset through grimy windows, and the neon bleed from late-night cityscapes. 3D Molester Train Man 2
The entertainment value of these 3D experiences stems from their immersive nature and the ability to simulate high-stakes environments. Japanese Train Drive Sim2 (often referred to in
Graduate the Academy: Complete the 10-level Train Academy to master the basic controls and "one-man" operations. Casual wear : Houtarou typically dresses in casual,