Okay. So, I know that out-of-universe, the PokeWalker was included with Pokemon HeartGold and SoulSilver as a way to encourage kids to exercise more. However, it had been my favorite aspect of SoulSilver back when I was playing it two years ago (another being the Battle Frontier that Platinum had introduced). The best part about it was being able to unlock new areas the more time you spent walking with it, which I did whenever there was something in the game proper I had to wait for or whenever I went somewhere that either involved a lot of walking or there was an opportunity to walk laps somewhere while waiting to leave. (Last route I managed to unlock before completing the game, Beyond the Sea notwithstanding, was Scary Cave.)
That all said, I'm looking for a way for such a thing to be able to work in fanfiction. So far, I've had several ideas going on about that:
Jamie has one of these from before he starts his journey. Once he has some Pokemon, one of their Pokeballs can then be inserted into the device, and the Pokemon inside is transported to a secluded place where it will either become happier (1 point for each hour) or gain more experience, depending on how pleasant or harsh the environment is for it (and different Pokemon will like different environments more than others), the longer it stays there.
Each time a Pokemon is sent, Jamie can also check up on it, and can collect up to one wild Pokemon and three items via a stylus, at the cost of some freshly-collected watts. (Whatever is available at any given time will be random.) Whichever Pokemon is inside the PokeWalker will not be in the party, and cannot be called out to battle. However, a space can be made within the party in order to recall the Pokemon, any wild Pokemon that are captured, but at a cost of some points made to it which could otherwise be saved to unlock new areas. (Recalling the Pokemon inserted will not cost any points.) Jamie can only watch what goes on with his Pokemon, but if it faints at any point, it will automatically be sent back to a PC Box, unless he has any empty spaces in his party (in which case it will end up there instead).
The longer a Pokemon remains inside the Walker, the more likely a new area will be enabled. Some areas can only be unlocked if Jamie wins 3rd place or higher in any PAL Park contests much later in the ficseries. There are two places that can only be unlocked through other criteria (those of course being Beyond the Sea and Night Sky's Edge). If the Pokemon is close to fainting, Jamie will receive a signal to intervene by either recall it or capture the Pokemon endangering it (only if it can recover on its own). If the Pokemon faints, no new watts will be accumulated, but the Pokemon will retain any happiness or experience that it has accumulated until that point.
Jamie receives it from Professor Elm after showing him the newly-hatched Togepi. From there on, he can use it at any point to teleport to any location available on it, whether to relax or to train his Pokemon through elements such as heat or cold. The more combined time he spends at any location, the more areas will be accessible.
In response to this, a friend of mine had some arguments against it. To quote him:
It kind of brings up serious plot issues, one of which being 'it's not real so everything he catches has to be Porygon or something' and another being 'why would Elm trust *this* piece of technology to him so soon when he doesn't really know Jamie' and a third one being 'this technology is way too advanced for the GSC characters...'.
I did tell him that, on the second point, he might just as easily buy it at a PokeMart (as long as he obtains one sufficiently early in the game). However, aside from his hatred for HGSS (or anything else that was introduced after Platinum), he actually had some valid points.
So, what I need to ask is, does anyone here have any ideas on how to properly implement an in-universe manifestation of the PokeWalker into fanfiction (and also, a potential in-universe reason why the other two main characters, who will explore Kanto and Hoenn respectively before all three mains venture into Sinnoh, never do have or obtain one)?