To contradict what Xanthine wrote, I will note that the episode with Professor Westwood does not continue with the canon of the series.
This is true, and to add, it should be noted that very little of the anime is continuous with itself. (The little white button for transferring Pokemon, anyone?) However, the original post concerned the part of the anime that insisted it was Westwood who oversaw the creation of the 'dex (if he isn't the sole mastermind behind it), and while Professor Oak could have been the designer, it's generally accepted that Westwood had a hand in the writing of its contents. It could be interpreted that the two worked together eventually, especially given the fact that Oak turns to Westwood in that particular episode for information on Slowbro.
Also, it would be highly unlikely for the trainers to record their own observations and put them into a PokeDex because of the voice alterations.
First off, I'm assuming this is my point about game continuity that you're arguing against (because the only time I mentioned trainers recording information was in regards to game canon), which doesn't use voices for its informational feed. Instead, it seems to use a text-based interface, which means the voice changes are a moot point.
Note, that some PokeDexes contain a feminine voice, which slightly hints to the fact that the PokeDex was created by more than one person.
Also note that every voice used by the Pokedex is actually a computerized voice. There
are programs that read off inputed data with a single voice, using similar inflections. For example, if you're using Windows XP, try this:
- Control Panel
- Speech
- Preview Voice
Although the voice sounds slightly more garbled than the Pokedex, also remember that the Pokemon world seems a bit more refined in terms of technology, so it could be that they've also managed to create a more understandable voice for the 'dex as well.
Trainers could also not record their observations because some entries relate to the history or its wilderness actions.
As I've noted before, it's possible that some data comes from Professor Oak himself, sent to the trainer and added to observations.
However...
For example, how would the trainer know that Taillow eats Wurmple,
Field observations. Taillow and Wurmple live in relatively the same areas (e.g., Petalburg Woods and Route 104), so spending an amount of time watching Taillow
can allow them to observe hunting habits.
or how would they know a Pokemon's part in a legend.
Regional folklore. These are, after all, usually people who have lived in the region for awhile or can listen to what other people have to say about local legends. Legendary Pokemon tend to be seen as religious aspects (a la Greek gods) in the Pokemon world, if they're not simply figures of old folktales (a la Paul Bunyan).
Also, there have been books that have made their appearance in the anime, which shows that information certainly was indeed pre-recorded before the invention of the PokeDex.
Again, it's not known how much information on every Pokemon is included in books, and even then, those could be parts of a trainer's prior knowledge, which would then be added to his own observations.
For example, Brock's books are a nice example as well as James's TCG cards that make recurring appearances in the anime.
Again, not part of the same continuum as what you're arguing against here.
As I've said before, please don't mix up anime and game continuum. They're really not compatible in some aspects, such as here, where you're providing anime examples when the Pokedex
is essentially complete by the time Ash receives it. As in, yes, a researcher (or a number of them) have actually gone out and completed the anime's version of the 'dex prior to Ash receiving it. However, in the games, this isn't so. The 'dex is an incomplete device; the inserted data appears to be taken by the trainer or at least recorded and possibly relayed through the Pokedex. It's not entirely clear, but the 'dex definitely isn't in the same stages of completion as the anime's version. (Not to mention it doesn't function the same way as the anime's, apparently, as I've noted above concerning voices.)
Besides, a trainer wouldn't just stare at a Pokemon and observe its actions all day, now would he?
Depends on the trainer. Given that this
is the basis of a trainer's quest in at least the first and second generations of games -- where the trainers are explicitly asked by a professor to go out and complete the 'dex -- I'd say yes, they
could, if they're particularly patient. I would, at least, if I happened to be asked.