IN ALL MAPS TWEAKING LOCATIONS ARE MARKED BY WHERE THE BLUE LOAD LINES CROSS
Azalea Town:
map
The Left tweaking location allows for access to the void, The right one lets you skip slowpoke well team rocket battles entirely.
New Bark Town:
Only reason to do this is to get HM waterfall early by walking to the dragon's den, you can't enter the void here.
Violet City:
[url="http://www.halloforigin.com/w/images/2/29/HGSS_Violet_City_Tweaking_Map.png'>map
All tweaks here are blocked except the one in the water, and you can't ride your bike there, so no need to look for them.
Cherrygrove City:
map
All tweaks here are blocked except the one in the water, and you can't ride your bike there, so no need to look for them.
Saffron City:
This tweak map I made myself. The unblocked tweak locations are highlighted in red. Both locations give access to the void.
More to come! :biggrin: