>>50086157I cant really help the distribution since MAINE IS TOO FUCKING LARGE
but yeah, some bridges and adjustments help.
The east bridge to the 2nd town isnt unlocked until you beat tbe first gym, and the north bridge until you beat the 7th gym.
>>50085986After you beat the 5th gym, you unlock the safari zone, which in addition to having the rare shit, allows for the northern and eastern routes in that loop to have higher level Pokemon.