>>46189703Development
1. A lot of Gen 5 mons were intended to be evolutions of existing mons (just like what Gen 4 did) but the idea was dropped during development either to give the mons less ties with past gens or because maybe there was internal conflict on design choice for the suggested evos. Mons I believe follow this are:
a. Luvdisc to Alomomola
b. Tauros to Bouffolant
c. Pachisiru to Emolga
2. Gastly was originally going to be an alt evo for Shellder but the idea was dropped.
3. Sabrina was supposed to have the Soul Badge and Koga was supposed to have the Marsh Badge but there was some communication error in development and their current badges just stuck.
4. Gen 2 NPC trainers have such low levels because GameFreak wanted people not to grind and to keep shuffling in and out new Pokemon.
Lore
1. Pokemon and humans have a symbiotic relationship. Even though humans are so much weaker than Pokemon, Pokemon have a biological NEED to serve humans. Those that don't are considered rabid (see Giratina).
2. Deoxys is an artificial Ultra Beast.
3. Unown are messengers of Arceus and would be used to communicate its will to the people. Humans grew proud and locked them away to subvert the will of Arceus.