Different Candy Routes for Rocky

Onix at +6 vs Blastoise:

L75: 2/16 | With 3rd Protein: 3/16 (explosion 7 candies)
L76: 3/16 | With 3rd Protein: 5/16 (explosion 8 candies)
L78: 8/16 | With 3rd Protein: 9/16 (explosion 10 candies)
L79: 11/16 | With 3rd Protein: 12/16 (no explosion 10 candies)
L80: 14/16 | With 3rd Protein: 100% (no explosion 11 candies)

You can setup X Sp Def's so Blatoise *usually* doesn't kill you (and kill with Screech + Earthquake), however he does have a chance to just randomly use Hydro Cannon T1 instead of Blizzard/Focus Blast, which kills no matter how many you setup

And given Blastoise is naturally faster than you, if he does so, you could find yourself in a wipe situation, as the only way to win after that is for him to miss afterwards (as all his attacks OHKO with no setup).

As such, it can be seen as worthwhile to get 11 candies to erase this chance. It does however, present risk elsewhere, as you won't get Explosion (specifically having to use more Stone Edge on Erika/Blue)

Here's a look at the finer details:
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Time to get Candy 8: 26.2 seconds
Time to get Candies 9+10+11: 83.8 seconds
(Each take an additional ~5 seconds to use)
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Differences with 8th candy:
(compared to 7 candies)

Don't pickup second Carbos. (save ~9 seconds)

No Chance of dying to 2 EQs from Brock's Graveler (only 2.3%, perhaps more relevantly it means the second turn he can't kill, so more chance of using Defense Curl and skipping the heal)

Better range on Arcanine (14/16 -> 100%)

Better range on Torkoal (7/16 -> 9/16)

Different movement through Kanto saves 12 seconds (Misty -> Sabrina -> Erika -> Janine)

No chance of getting an encounter on grass from Vermillion -> Explosion -> Snorlax

WORSE range on Misty's Lapras (14/16 -> 13/16)

Can not Explode on Misty's Starmie (loses 18.9 seconds)

Speedtie with Janine's Crobat (instead of lose)

Better range on Janine's Weezing (13/16 -> 100%)

Better range to not triple revive on Blue:
Rhydon EQ + Arcanine DP kill chance: 35.2% -> 19.5%

Better range to not heal on Blue:
Rhydon EQ + Arcanine DP to not in ES range: 98.8% -> 89.5%

Better range to OHKO Blue's Pidgeot:
+0 SE: 13/16 -> 15/16
-1 Explosion: 6/16 -> 9/16

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Differences of Candies 9+10+11:
(compared to Candy 8)

Do not get Explosion (Save 64.3 secs)
Better route through Kanto saves 34 secs (Misty early, no early Power Plant)

No Explosion for Erika loses 42.8 secs (assuming no SE misses, use 2 more)
No Explosion for Blue loses 55.4 secs (If have intimidate Ekans, only loses 26.5 secs)
(these numbers can differ wildly, assumes best case in all scenarios)

Get 3rd Protein (~9 secs)

Better range vs Joe's Tangela (11/16 -> 12/16)

Better range on Porygon (14/16 -> 100%)

Better range on Misty's Lapras (13/16 -> 14/16)

Only 1 X Att on Brock
(Means skip an X Att, and erase heal chance on Graveler using EQ twice.)

Better range on Torkoal (9/16 -> 100%)

Outspeed Crobat (instead of speedtie)
Can Rock Throw Crobat (instead of Stone Edge)

100% to OHKO Red's Blastoise.

Better setup vs Pikachu
Chance of dying to +1 & +2 Iron Tail: 87.5% -> 5.5%

Faster setup vs Pikachu, only need 1 X Sp Def to Survive a hit from Snorlax.
(Only +1 instead of +6)
Additionally, Stone Edge is 12/16 to OHKO Snorlax, can go for that too if you wish to save another turn.