I personally think that a PP up Mansion Candy Route is better than 4 Repel... if you X Acc on Viridian Rival. So here's my PP up route

I'm only highlighting important things and major differences from the current 4 repel route. So if something isn't mentioned, assume it is the same.

3 Balls If you want to buy more balls then you can buy 3 super potions instead (this doesn't work for early drill, so either figure out the shopping, or just never do early drill (This also allows for 8 potions without changed X item buys))
7 Potions (Buy 8 Potions if you have NO intention of silph red bar. You can make silph bar work with 8 Potions but its riskier.)

Get Route 25 Ether (the one just before Bill)

Buy 3 repels 2 Para heals

Swap up Repel on Cut Menu

Shopping (No Early Drill)
10 Super Repels
4 Super Potions
1 Poke Doll
1 Soda Pop (to trade for Rock Slide)
1 Fresh Water
11 X Accuracies
5 X Specials
3 X Speeds (Buy 3 X Specials 4 X Speeds if you bought 8 Potions)


Shopping (Early Drill) 
10 Super Repels
3 Super Potions
1 Pokedoll
1 Soda Pop (To trade for Rock Slide)
1 Fresh Water
12 X Accuracies
5 X Specials
3 X Speeds (Again, buy 3 X Specials 4 X Speeds if you bought 8 Potions)

Fly Menu (No Early Drill): 
Swap slot 2 With TM07 
use a Super Repel
teach TM48 in slot 1
swap slot 3 with X Accuracy
teach HM02 to flier
fly to Lavender.

On Early Drill, do the same thing, but Teach TM07 in slot 1, rock slide in slot 2, and swap slot 2 with X Accuracy (since TM07 is not in slot 2)

Ghost Menu: Swap slot 3 with Super Repels, Poke Doll

On Arbok, you can either Thrash or X Acc + Drill. If you X Acc + Drill then you only have 4 Drills for Silph Rival. Either Rock Slide Growlithe, BB it x2, or go for Silphbar and BB it for a 1 shot if you X Acc Drill.

Silph Rival:
Swap slot 4 with Rare Candies after X Acc-ing, then either speed, or special if going for silph redbar and your HP suggests X Special.

Use ELIXER after Silph Rival, not ether.

Snorlax Menu: Super repel, swap slot 5 with X Special, Pokeflute

Post Cycling Road Menu: Super Repel, Swap slot 7 with PP Up, teach Earthquake, Bicycle

Standard Safari Zone:

Surf Menu: Super Repel, swap slot 8 with X Speeds, teach Surf

Blizzard Menu: Teach Strength, Teach Blizzard, Super Repel, Use PP up

Blaine: Horn Drill if turn 1 Super Potion

Viridian Rival: X Acc, X Speed, Blizzard (TB if it lives and only 1 Blizz remaining), Blizzard, TB, EQ, EQ, HD. Leave at least 1 Blizzard for after fight

Ether for Bruno and Drill all 5

Heal and Candy for Agatha. X Spec, EQ, Blizz Golbat, EQ all

Elixer after Agatha

Drill Champ x6 (Unless turn 1 Sky Attack of course)