General Changes
This includes anything from stat editing to new/legendary locations.
Scroll to the bottom to find out the evolution changes.
You can find all of the evolution stones at Olivine City Mart!

Kanto

#012 Butterfree


HP 60 → 75
Attack 45 → 55
Defence 50 → 65
Total 385 → 425

#015 Beedrill


Defence 40 → 65
Sp. Attack 45 → 70
Total 385 → 435

#018 Pidgeot


HP 83 → 93
Attack 80 → 90
Defence 75 → 85
Total 469 → 499

#020 Raticate


HP 55 → 75
Sp. Attack 50 → 70
Total 413 → 453

#022 Fearow


Sp. Attack 61 → 71
Sp. Defence 61 → 71
Total 442 → 462
#031 Nidoqueen


Sp. Attack 75 → 85
Total 495 → 505

#034 Nidoking


Sp. Defence 75 → 85
Total 495 → 505

#038 Ninetales

HP 73 → 83
Defence 75 → 85
Sp. Attack 81 → 86
Total 505 → 530

#048 Parasect

HP 60 → 75
Sp. Attack 60 → 75
Speed 30 → 60
Total 405 → 465


#050 Venomoth

Attack 65 → 75
Defence 60 → 75
Total 450 → 475

#053 Persian


HP 65 → 80
Defense 60 → 75
Sp. Attack 65 → 75
Sp. Defence 65 → 75
Total 440 → 490
#057 Primeape


HP 65 → 75
Defense 60 → 75
Total 455 → 480

#062 Poliwrath



Sp. Attack 70 → 85
Total 500 → 515

#071 Victreebel



Defense 65 → 75
Sp. Defence 60 → 70
Total 480 → 500

#078 Rapidash



HP 65 → 75
Total 500 → 510

#083 Farfetch’d


HP 52 → 62
Attack 65 → 75
Defense 55 → 65
Sp. Attack 58 → 68
Sp. Defence 62 → 72
Speed 60 → 70
Total 352 → 412




#085 Dodrio



Sp. Attack 60 → 70
Sp. Defence 60 → 70
Total 460 → 480

#090 Shellder

HP 30 → 45
Sp. Attack 45 → 55
Sp. Defence 25 → 45
Total 305 → 350

#091 Cloyster

HP 50 → 60
Sp. Defence 45 → 55
Total 525 → 545
#097 Hypno


Sp. Attack 73 → 93
Total 483 → 503

#099 Kingler


HP 55 → 60
Sp. Attack 50 → 60
Sp. Defence 50 → 60
Total 475 → 500

#105 Marowak


Speed 45 → 65
Sp. Attack 50 → 60
Total 425 → 455
#110 Weezing



Sp. Defence 70 → 80
Total 490 → 500

#112 Rhydon


Sp. Attack 45 → 65
Sp. Defence 45 → 60
Speed 40 → 60
Total 485 → 540


#119 Seaking



Defence 65 → 75
Sp. Attack 65 → 75
Total 450 → 470

Johto

#162 Furret



Sp. Attack 45 → 65
Sp. Defence 55 → 65
Total 415 → 445

#164 Noctowl



Attack 50 → 60
Defence 50 → 60
Total 442 → 462

#166 Ledian


HP 55 → 75
Attack 35 → 65
Defence 50 → 60
Sp. Attack 55 → 75
Speed 85 → 115
Total 390 → 500

#168 Ariados



HP 70 → 85
Defence 70 → 90
Sp. Attack 60 → 85
Sp. Defence 60 → 75
Speed 40 → 75
Total 390 → 500

#171 Lanturn



Defence 58 → 68
Speed 67 → 77
Total 460 → 480

#177 Natu


HP 40 → 50
Defence 45 → 55
Total 320 → 340

#178 Xatu


HP 65 → 85
Defence 70 → 80
Total 470 → 500

#184 Azumarill



Attack 50 → 60
Sp. Attack 50 → 60
Speed 50 → 60
Total 410 → 440

#185 Sudowoodo



HP 70 → 80
Sp. Attack 30 → 50
Total 410 → 440

#189 Jumpluff



Sp. Attack 55 → 75
Total 450 → 470

#192 Sunflora


Defence 55 → 65
Speed 30 → 50
Total 425 → 455

#193 Yanma


Defence 45 → 65
Sp. Defence 45 → 55
Total 390 → 420






#198 Murkrow


HP 60 → 65
Defence 42 → 52
Sp. Defence 42 → 72
Total 405 → 450


#200 Misdreavus


HP 60 → 70
Defence 60 → 65
Total 435 → 450

#203 Girafarig


Defence 65 → 75
Sp. Defence 65 → 85
Total 455 → 485

#215 Sneasel

Sp. Attack 35 → 55
Total 430 → 450

#234 Stantler


HP 73 → 78
Defence 62 → 82
Sp. Defence 65 → 75
Total 465 → 500

#241 Miltank


HP 95 → 105
Total 490 → 500


Attack Changes

Tackle now has a power of 40
Whirlpool now has a power of 40
Poison Sting now has a Power of 40
Twin Needle now has a power of 30
Peck now has a power of 40
Drill Peck now has a power of 90
Absorb now has a power of 30
Mega Drain now has a power of 50
Dig now has a power of 70
Lick now has a power of 30
Smog now has a power of 30
Rock Smash now has a power of 40
Bone Club now has a power of 70
Constrict now has a power of 20
Hi Jump Kick now has a power of 90
Bubble now has a power of 30
Bonemerang now has a power of 60
Slash now has a power of 75
Triple Kick now has a power of 20
Thief now has a power of 50
Powder Snow now has a power of 50
Faint Attack now has a power of 70
Mud-Slap now has a power of 30
Icy Wind now has a power of 65
Bone Rush now has a power of 30
Twister now has a power of 50
Metal Claw now has a power of 60
Crunch now has a power of 90 & PP of 20
Giga Drain now has a power of 75 & PP of 10
Fury Cutter now has a power of 30 & PP of 25
Steel Wing now has a power of 80 & PP of 30
Pursuit now has a power of 50 & PP of 30
Shadow Ball now has a PP of 20
Dynamicpunch now has a PP of 10
Vital Throw now has a PP of 15
Extremespeed now has a PP of 10
Cross Chop now has a PP of 10

Location Additions
Only a few areas have been edited which may include an increase in level or adding those Pokémon not usually available in Crystal. These are the following that have been added to which area, there are Routes (mainly in Kanto) that have been completed unedited this is because you can find the majority of Kanto & Johto Pokemon in the game already.

Mankey ~ Route 30
Sandshrew ~ Dark Cave
Cubone ~ Dark Cave
Diglett ~ Dark Cave
Vulpix ~ Route 32
Mareep ~ Route 32
Totodile ~ Route 33
Teddiursa ~ Union Cave
Phanpy ~ Union Cave
Girafarig ~ Ruins Of Alph
Paras ~ Ilex Forest
Metapod ~ Ilex Forest
Kakuna ~ Ilex Forest
Spinirak ~ Ilex Forest
Ledyba ~ Ilex Forest
Oddish ~ Ilex Forest
Venonat ~ Ilex Forest
Ponyta ~ Route 34
Chikorita ~ Route 34
Nidoran [F] ~ Route 35
Nidoran [M] ~ Route 35
Tangela ~ Route 35
Cyndaquil ~ Route 35
Houndour ~ National Park
Murkrow ~ National Park
Pikachu ~ National Park
Marill ~ National Park
Snubbull ~ National Park
Cubone ~ National Park
Diglett ~ National Park
Paras ~ Route 36
Psyduck ~ Route 36
Venonat ~ Route 36
Stantler ~ Route 37
Slugma ~ Route 37
Oddish ~ Route 37
Sunkern ~ Route 37
Pidgeotto ~ Route 37
Doduo ~ Route 37
Bulbasaur ~ Route 37
Kangaskhan ~ Route 38
Noctowl ~ Route 38
Squirtle ~ Route 38
Meowth ~ Route 39
Voltorb ~ Route 39
Magby ~ Route 39
Elekid ~ Route 39
Exeggcute ~ Route 39
Dratini ~ Route 39
Charmander ~ Route 39
Kabuto ~ Route 42
Omanyte ~ Route 43
Flaaffy ~ Route 43
Remoraid ~ Route 44
Chansey ~ Route 44
Sandslash ~ Route 45
Dugtrio ~ Route 45
Machop ~ Route 46
Eevee ~ Route 46
Smoochum ~ Route 46
Fearow ~ Route 47
Arbok ~ Route 47
Raticate ~ Route 47
Weezing ~ Route 47
Ponyta ~ Route 47
Dodrio ~ Route 47
Tangela ~ Route 47
Dodrio ~ Route 48
Parasect ~ Route 48
Raticate ~ Route 48
Muk ~ Route 48
Golem ~ Victory Road
Steelix ~ Victory Road
Aerodactyl ~ Victory Road
Machamp ~ Victory Road
Pinsir ~ Route 10
Tauros ~ Route 10
Magmar ~ Route 10
Electabuzz ~ Route 10
Scyther ~ Route 10
Jynx ~ Route 10
Mr. Mime ~ Route 10
Chansey ~ Route 6
(You can find Route 6 full of Chansey as the best training spot)

Legendaries

#142 Articuno


Articuno can be found by Fuchsia City on Route 15 at Level 50!

#143 Moltres


Moltres can be found outside Cerulean City on Route 5 at Level 50!

#144 Zapdos


Zapdos can be found outside the Power Plant on Route 10 at Level 50!

#151 Mewtwo


Mewtwo can be found in the final room (Red Room) in Mt. Silver at Level 75!
#152 Mew

Mew can be found in the lower floor of Mt. Silver at Level 30!

#251 Celebi

Celebi can be found on Route 22 at Level 35!


Evolutions / Trades


The following evolutions have been changed; you can purchase the elemental stones in Olivine City Mart!

Shellder > Cloyster
 →
Level 45

Onix > Steelix
 →
Level 43

Scyther > Scizor
 →
Level 43

Porygon > Porygon2
 →
Level 44

Machamp
 →
Level 46

Graveler > Golem
 →
Level 43

Haunter > Gengar
 →
Level 42

Kadabra > Alakazam
 →
Level 45

Seadra > Kingdra
 →
Level 48

Poliwhirl > Politoed
 →
Level 46



Slowpoke > Slowking
 →
Item: Water Stone

Eevee > Umbreon
 →
Item: Moon Stone

Eevee > Espeon
 →
Item: Sun Stone


In-Game Trade Changes
These are the trades you make through the game; some of these have been altered to the following.



Trade #1 (Violet City)
 →
Your Offer           Received
Bellsprout            Staryu


Trade #2 (Goldenrod City)
 →
Your Offer	Received
Tangela		Horsea


Trade #3 (Olivine City)
 →
  Your Offer	 Received
Drowzee               Shellder

Trade #4 (Blackthorn City)
 →
Your Offer	Received
     Scyther	Kangaskhan