Unfortunately, there's no way to obtain these apps anymore through legitimate means. The event was time-limited, and the apps were never made available again.
Here's why you might be struggling to find information about this event:
* Limited Availability: The event was exclusive to Japan, and the apps were never released in other regions.
* Lack of Official Information: Nintendo doesn't typically release much information on limited-time events, especially after they've ended.
* Time Has Passed: With the event being over a decade old, information about it has likely faded into obscurity.
While you can't get these apps now, there are other ways to manage your time in the game:
* Using the game's internal timer: Pokémon Mystery Dungeon games have a built-in clock to keep track of the time passing in the game.
* Setting reminders on your phone: You can use your phone's alarm or calendar to remind you of important tasks or deadlines.
While it's disappointing that you missed out on the Pokétech apps, there are still ways to manage your time in the game!