standard reroute (r3 bug catcher + wild + hiker nob) + candy to 33 for jiggly and candy to 41 for pidgeot (no charcoal)

(can switch to nido candy route on good pace or bad hp/sp. atk for onix)
(can also fight top hiker, butterfree guy or pidgey/nidoran girl instead of killing wild)
(can also usually fight any 2 of the 3 above instead of route 3 bug catcher, if you prefer your hp/ember/wild exp/stats after brock. need 51 pre-brock exp for top hiker + butterfree guy, 53 for top hiker + pidgey/nidoran girl, and any for top hiker + pidgey/nidoran girl. just be wary of L17 for pidgeotto)

good:
- can run lower speed (-2)
- no need to save early ember pp (-5)
- safer moon (-4)
- 18 pidgeotto (-4)
- 19 rattata (-1)
- 24 raticate (-3)
- 29 misty (-2)
- 30 weedle (-0.5)
- 30 cubone (-0.5)
- 30 slowpoke (-2)
- 31 machop/onix (-1)
- 33 jigglypuff (-0.5)
- 33 graveler (-3)
- 34 clefairies (-3)
- better onix range with 31 iv (-0.5)
- skip wing attack (-7)
- 37 rhyhorn (-0.5)
- 37 kangaskhan (-1)
- 38 wartortle (-3)
- 39 marowak (-1)
- 41 pidgeot (-0.5)
- 41 blastoise (-2)
- 42 drowzee (-0.5)
- no pp management in gio's gym (-0.5)
- easier to teach sunny day and fire blast together (-1.5)
- 52 viridian rival (-5)
- better candy menus (-3.5)
- extra level + 5 spa EVs for e4 (-27.5, depends on stats but never higher than -33 because old route could get silph candy)
TOTAL: -85.5

bad:
- take pewter center (+12)
- get 32 wild exp (+4)
- fight route 3 bug catcher instead of lass (+1)
- less blaze in moon (+2.5)
- fight hiker nob with geo range (+21)
- 24/25 for rival (+5)
- worse deathwarp options (+1)
- more boat heal uses (+3)
- can't fight L25 geodude in rock tunnel (+2.5)
- slower erika's gym (+9)
- tighter pp before heal pad (+1.5)
- extra elixer (+6)
- 42 for kanga (+2)
- 45 for muk + 45 for blaine OR instead of 46 for muk OR 48 for blaine (+3)
TOTAL: +73.5

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skip first forest trainer, fight minion for 257 more exp

good:
- skip first forest trainer (-35)
- 13 + metal claw for geodude (-7)
- can 3hko onix with geo attack boost (-1)
- 15 rattata (-1)
- 16/charmeleon for moon rocket (-8)
- 18 pidgeotto (-4)
- 19 rattata (-1)
- 24 raticate (-3)
- save a candy or use it early (-25)
- 29 misty (-2)
- 30 weedle (-0.5)
- 30 cubone (-1)
- 30 slowpoke (-2)
- 31 machop (-1)
- 33 jigglypuff (-0.5)
- 33 graveler (-3)
- 34 clefairies (-3)
- 37 kangaskhan (-1)
- 40 blastoise (-1.5)
- 41 drowzee (-0.5)
- more money for charcoal (-1)
TOTAL: -102

bad:
- fight minion (+66)
- extra heal for brock (+3)
- ember pp is worse on average because of sand and defense curl (+2)
- fight hiker nob with geo range (+21)
- 24/25 for rival (+5)
- slower erika's gym movement (+3)
- 41/42 giovanni (+5)
- no blaine candy flexibility (+1)
TOTAL: +106

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candy to 22 for nidos route

good:
- safer moon (-3)
- 18 pidgeotto (-4)
- 19 rattata (-1)
- safer route 25 hiker (-3)
- 24 raticate (-3)
- late-game candy (-25)
- 29 misty (-2)
- 30 weedle (-0.5)
- 30 cubone (-1)
- 30 slowpoke (-2)
- 31 machop (-1)
- 33 jigglypuff (-0.5)
- 33 graveler (-3)
- 34 clefairies (-3)
- 37 kangaskhan (-1)
- 40 blastoise (-1.5)
- 41 drowzee (-0.5)
- more money for charcoal (-1)
TOTAL: -56

bad:
- fight route 3 bug catcher + 32 wild exp instead of lass (+15)
- fight top hiker (53% geo) (+3)
- fight hiker nob (guaranteed geo) (+15)
- fight butterfree trainer (guaranteed) (+23)
- 25/26 rival (barely matters) (+2)
- slower erika's gym movement (+3)
- 41/42 giovanni (+5)
- no blaine candy flexibility (+1)
TOTAL: +67