Leveling and downleveling for some routes?

Question

between b/w and b2/w2, a lot has changed, but this is still a mystery to me.
how can places like route 1 have their Pokemons levels go from level 3 to level 53, and places like route 12 have their Pokemon go from level 52 to level 32?
i dont know why...

Answer 1

Since some places are accesable at different points in the game, the game makers had to change the Pokemon's levels at different routs. If they didn't do this, they wouldn't have the Pokemon at a good level for battling.