I have found these codes hope they help you =)!!!!!

No Random Battles:01033D1
Infinite HP:019947D3
Infinite HP in battle:01FF16D0
Infinite Money:019947D3
019948D3
019949D3
Master Balls for free in Pokèmon marts:01017CCF
Badges:(they will be in your items once you put in the code), put these badges in ONE at a time!
Boulder badge:01151ED3
Cascade badge:01161ED3
Thunder badge:01171ED3
Rainbow badge:01181ED3
Soul badge:01191ED3
Marsh badge:011A1ED3
Volcano badge:011B1ED3
Earth badge:011C1ED3
Replace the xx with the corresponding number:01xx7ccf
Master Ball:01
Ultra Ball:02
Great Ball:03
Pokéball:04
Moon Stone:0A
Antidote:0B
Burn Heal:0C
Ice Heal:0D
Awakening:0E
Parlyz Heal:0F
Full Restore:10
Max Potion:11
Hyper Potion:12
Super Potion:13
Potion:14
Escape Rope:1D
Repel:1E
Fire Stone:20
Thunder Stone:21
Water Stone:22
HP up:23
Protein:24
Iron:25
Carbos:26
Calcium:27
Rare Candy:28
X Accuracy:2E
Leaf Stone:2F
Nugget:31
PP up:32
Poké doll:33
Full Heal:34
Revive:35
Max Revive:36
Guard Spec.:37
Super Repel:38
Max Repel:39
Dire Hit:3A
Coin(game corner):3B
Fresh Water:3C
Soda Pop:3D
Lemonade:3E
X Attack:41
X Defend:42
X Speed:43
X Special:44
Exp. All:4B
PP up:4F
Ether:50
Max Ether:51
Elixer:52
Max Elixer:53
TM's(01-50):
TM01:C9
TM02:CA
TM03:CB
TM04:CC
TM05:CD
TM06:CE
TM07:CF
TM08:D0
TM09:D1
TM10:D2
TM11:D3
TM12:D4
TM13:D5
TM14:D6
TM15:D7
TM16:D8
TM17:D9
TM18:DA
TM19:DB
TM20:DC
TM21:DD
TM22:DE
TM23:DF
TM24:E0
TM25:E1
TM26:E2
TM27:E3
TM28:E4
TM29:E5
TM30:E6
TM31:E7
TM32:E8
TM33:E9
TM34:EA
TM35:EB
TM36:EC
TM37:ED
TM38:EE
TM39:EF
TM40:F0
TM41:F1
TM42:F2
TM43:F3
TM44:F4
TM45:F5
TM46:F6
TM47:F7
TM48:F8
TM49:F9
TM50:FA
HM's(01-05):
HM01:FB
HM02:FC
HM03:FD
HM04:FE
HM05:FF

Or you can use these:
1st Pokèmon In Battle Codes
4 Infinite PP (1st Position) 01282DD0
5 Infinite PP (2nd Position) 01282ED0
6 Infinite PP (3rd Position) 01282FD0
7 Infinite PP (4th Position) 012830D0
8 Skill Modifier (1st Position) 01??1CD0
9 Skill Modifier (2nd Position) 01??1DD0
10 Skill Modifier (3rd Position) 01??1ED0
11 Skill Modifier (4th Position) 01??1FD0

1st Pokèmon Out Of Battle Codes
12 Infinite PP (1st Position) 01FF88D1
13 Infinite PP (2nd Position) 01FF89D1
14 Infinite PP (3rd Position) 01FF8AD1
15 Infinite PP (4th Position) 01FF8BD1
16 Skill Modifier (1st Position) 01??73D1
17 Skill Modifier (2nd Position) 01??74D1
18 Skill Modifier (3rd Position) 01??75D1
19 Skill Modifier (4th Position) 01??76D1
20 Level Modifier 01??8CD1
21 Max HP Modifier (Smaller) 01??8ED1
22 Max HP Modifier (Larger) 01??8DD1
23 Max Attack Modifier (Smaller) 01??90D1
24 Max Attack Modifier (Larger) 01??8FD1
25 Max Defense Modifier (Smaller) 01??92D1
26 Max Defense Modifier (Larger) 01??91D1
27 Max Speed Modifier (Smaller) 01??94D1
28 Max Speed Modifier (Larger) 01??93D1
29 Max Special Modifier (Smaller) 01??96D1
30 Max Special Modifier (Larger) 01??95D1
Item Codes
31 Total Item Number Modifier [Note 1] 01??1DD3
32 Item Modifier 1st Position 01??1ED3
33 Infinite Quantity 1st Position 01631FD3
34 Item Modifier 2nd Position 01??20D3
35 Infinite Quantity 2nd Position 016321D3
36 Item Modifier 3rd Position 01??22D3
37 Infinite Quantity 3rd Position 016323D3
38 Item Modifier 4th Position 01??24D3
39 Infinite Quantity 4th Position 016325D3
40 Item Modifier 5th Position 01??26D3
41 Infinite Quantity 5th Position 016327D3
42 Item Modifier 6th Position 01??28D3
43 Infinite Quantity 6th Position 016329D3
44 Item Modifier 7th Position 01??2AD3
45 Infinite Quantity 7th Position 01632BD3
46 Item Modifier 8th Position 01??2CD3
47 Infinite Quantity 8th Position 01632DD3
48 Item Modifier 9th Position 01??2ED3
49 Infinite Quantity 9th Position 01632FD3
50 Item Modifier 10th Position 01??30D3
51 Infinite Quantity 10th Position 016331D3

Quantity Digits to Accompany Item Modifier Codes
00 - ?????
01 - Master Ball
02 - Ultra Ball
03 - Great Ball
04 - PokéBall
05 - Town Map
06 - Bicycle
07 - Surf Without Pokémon
08 - Safari Ball
09 - PokéDex
0A - Moon Stone
0B - Antidote
0C - Burn Heal
0D - Ice Heal
0E - Awakening
0F - Parlyz Heal
10 - Full Restore
11 - Max Potion
12 - Hyper Potion
13 - Super Potion
14 - Potion
15 - Boulder Badge
16 - Cacade Badge
17 - Thunder Badge
18 - Rainbow Badge
19 - Soul Badge
1A - Marsh Badge
1B - Volcano Badge
1C - Earth Badge
1D - Escape Rope
1E - Repel
1F - Old Amber
20 - Fire Stone
21 - Thunder Stone
22 - Water Stone
23 - HP Up
24 - Protein
25 - Iron
26 - Carbos
27 - Calcium
28 - Rare Candy
29 - Dome Fossil
2A - Helix Fossil
2B - Secret Key
2C - ?????
2D - Bike Voucher
2E - X Accuracy
2F - Leaf Stone
30 - Card Key
31 - Nugget
32 - PP Up
33 - PokéDoll
34 - Full Heal
35 - Revive
36 - Max Revive
37 - Grand Special
38 - Super Repel
39 - Max Repel
3A - Dire Hit
3B - Coin
3C - Fresh Water
3D - Soda Pop
3E - Lemonade
3F - S.S. Ticket
40 - Gold Teeth
41 - X Attack
42 - X Defend
43 - X Speed
44 - X Special
45 - Coin Case
46 - Oak's Parcel
47 - Item Finder
48 - Silph Scope
49 - Pokéflute
4A - Lift Key
4B - Exp. All
4C - Old Rod
4D - Good Rod
4E - Super Rod
4F - PP Up
50 - Ether
51 - Max Ether
52 - Elixer
53 - Max Elixer

Quantity Digits to Accompany Skill Modifier Codes
00 - Nothing
01 - Pound
02 - Karate Chop
03 - Double Slap
04 - Comet Punch
05 - Mega Punch
06 - Pay Day
07 - Fire Punch
08 - Ice Punch
09 - Thunder Punch
0A - Scratch
0B - Vice Grip
0C - Guillotine
0D - Razor Wind
0E - Swords Dance
0F - Cut
10 - Gust
11 - Wing Attack
12 - Whirlwind
13 - Fly
14 - Bird
15 - Slam
16 - Vine Whip
17 - Stomp
18 - Double Kick
19 - Mega Kick
1A - Jump Kick
1B - Rolling Kick
1C - Sand Attack
1D - Head Butt
1E - Horn Attack
1F - Fury Attack
20 - Horn Drill
21 - Tackle
22 - Body Slam
23 - Wrap
24 - Take Down
25 - Thrash
26 - Double Edge
27 - Tail Whip
28 - Poison Sting
29 - Twin Needle
2A - Pin Missile
2B - Leer
2C - Bite
2D - Growl
2E - Roar
2F - Sing
30 - Supersonic
31 - Sonicboom
32 - Disable
33 - Acid
34 - Ember
35 - Flamethrower
36 - Mist
37 - Water Gun
38 - Hydro Pump
39 - Surf
3A - Ice Beam
3B - Blizzard
3C - Psybeam
3D - Bubblebeam
3E - Aurora Beam
3F - Hyper Beam
40 - Peck
41 - Drill Peck
42 - Submission
43 - Low Kick
44 - Counter
45 - Seismic Toss
46 - Strength
47 - Absorb
48 - Mega Drain
49 - Leech Seed
4A - Growth
4B - Razor Leaf
4C - Solar Beam
4D - Poisonpowder
4E - Stun Spore
4F - Sleep Powder
50 - Petal Dance
51 - String Shot
52 - Dragon Rage
53 - Fire Spin
54 - Thundershock
55 - Thunderbolt
56 - Thunder Wave
57 - Thunder
58 - Rock Throw
59 - Earthquake
5A - Fissure
5B - Dig
5C - Toxic
5D - Confusion
5E - Psychic
5F - Hypnosis

60 - Meditate
61 - Agility
62 - Quick Attack
63 - Rage
64 - Teleport
65 - Night Shade
66 - Mimic
67 - Screech
68 - Double Team
69 - Recover
6A - Harden
6B - Minimize
6C - Smoke Screen
6D - Confuse Ray
6E - Withdraw
6F - Defense Curl
70 - Barrier
71 - Light Screen
72 - Haze
73 - Reflect
74 - Focus Energy
75 - Hide
76 - Metronome
77 - Mirror Move
78 - Selfdestruct
79 - Egg Bomb
7A - Lick
7B - Smog
7C - Sludge
7D - Bone Club
7E - Fire Blast
7F - Waterfall
80 - Clamp
81 - Swift
82 - Skull Bash
83 - Spike Cannon
84 - Constrict
85 - Amnesia
86 - Kinesis
87 - Softboiled
88 - Hi Jump Kick
89 - Glare
8A - Dream Eater
8B - Poison Gas
8C - Barrage
8D - Leech Life
8E - Lovely Kiss
8F - Sky Attack
90 - Transform
91 - Bubble
92 - Dizzy Punch
93 - Spore
94 - Flash
95 - Psywave
96 - Splash
97 - Acid Armor
98 - Crabhammer
99 - Exposion
9A - Fury Swipes
9B - Bonemerang
9C - Rest
9D - Rock Slide
9E - Hyper Fang
9F - Sharpen
A0 - Conversion
A1 - Tri Attack
A2 - Super Fang
A3 - Slash
A4 - Substitute
A5 - Struggle

To fight certain people at any time.
00XXD8CF (the xx's are where the letters listed go.)
CA: Bugcatcher
CB: Lass
CC: Sailor
CD: JR. Trainer-boy
CE: JR. Trainer-girl
CF: Pokémaniac
C9: Youngster
DA: Beauty
DB: Pshychic
DD: Juggler
DE: Tamer
DF: Bird Keeper
D1: Hiker
D0: Supernerd
D2: Biker
D3: Burglar
D4: Engineer
D5: Juggler
D6: Fisherman
D7: Swimmer
D8: Cue-Ball
D9: Gambler
EA: Brock
EB: Misty
EC: Lt.Surge
ED: Erika
EE: Koga
EF: Blaine
E1: Gary 1
E2: Prof. Oak
E3: Chief
E4: Scientest
E5: Giovanni
E6: Team Rocket
E7: CoolTrainer-boy
E8: CoolTrainer-girl
E9: Bruno
E0: BlackBelt
F1: Gentleman
F2: Gary 2
F3: Gary 3
F4: Lorelei
F5: Channeler
F6: Agatha
F7: Lance
F8: none
F9: none
F0: Sabrina
Replace xx with the Pokémon numbers by their name.
#000=Missingno.:20
#001=Bulbasaur:99
#002=Ivysaur:09
#003=Venusaur:9A
#004=Charmander:B0
#005=Charmeleon:B2
#006=Charizard:B4
#007=Squirtle:B1
#008=Wartortle:B3
#009=Blastoise:1C
#010=Caterpie:7B
#011=Metapod:7C
#012=Butterfree:7D
#013=Weedle:70
#014=Kakuna:71
#015=Beedrill:72
#016=Pidgey:24
#017=Pidgeotto:96
#018=Pidgeot:97
#019=Rattata:A5
#020=Raticate:A6
#021=Spearow:05
#022=Fearow:23
#023=Ekans:6C
#024=Arbok:2D
#025=Pikachu:54
#026=Raichu:55
#027=Sandshrew:60
#028=Sandslash:61
#029=Nidoran(Female):0F
#030=Nidorina:A8
#031=Nidoqueen:10
#032=Nidoran(Male):03
#033=Nidorino:A7
#034=Nidoking:07
#035=Clefairy:04
#036=Clefable:8E
#037=Vulpix:52
#038=Ninetales:53
#039=Jigglypuff:64
#040=Wigglytuff:65
#041=Zubat:6B
#042=Golbat:82
#043=Oddish:B9
#044=Gloom:BA
#045=Vileplume:BB
#046=Paras:6D
#047=Parasect:2E
#048=Venonat:41
#049=Venomoth:44
#050=Diglett:3B
#051=Dugtrio:76
#052=Meowth:4D
#053=Persian:90
#054=Psyduck:2F
#055=Golduck:80
#056=Mankey:39
#057=Primeape:75
#058=Growlithe:21
#059=Arcanine:14
#060=Poliwag:47
#061=Poliwhirl:6E
#062=Poliwrath:6F
#063=Abra:94
#064=Kadabra:26
#065=Alakazam:95
#066=Machop:6A
#067=Machoke:29
#068=Machamp:7E
#069=Bellsprout:BC
#070=Weepinbell:BD
#071=Victreebell:BE
#072=Tentacool:18
#073=Tentacruel:9B
#074=Geodude:A9
#075=Graveler:27
#076=Golem:31
#077=Ponyta:A3
#078=Rapidash:A4
#079=Slowpoke:25
#080=Slowbro:08
#081=Magnemite:AD
#082=Magneton:36
#083=Farfetch'd:40
#084=Doduo:46
#085=Dodrio:74
#086=Seel:3A
#087=Dewgong:78
#088=Grimer:0D
#089=Muk:88
#090=Shellder:17
#091=Cloyster:8B
#092=Gastly:19
#093=Haunter:93
#094=Gengar:0E
#095=Onix:22
#096=Drowzee:30
#097=Hypno:81
#098=Krabby:4E
#099=Kingler:8A
#100=Voltorb:06
#101=Electrode:8D
#102=Exeggcute:0C
#103=Exeggutor:0A
#104=Cubone:11
#105=Marowak:91
#106=Hitmonlee:2B
#107=Hitmonchan:2C
#108=Lickitung:0B
#109=Koffing:37
#110=Weezing:8F
#111=Rhyhorn:12
#112=Rhydon:01
#113=Chansey:28
#114=Tangela:1E
#115=Kangaskhan:02
#116=Horsea:5C
#117=Seadra:5D
#118=Goldeen:9D
#119=Seaking:9E
#120=Staryu:1B
#121=Starmie:98
#122=Mr. Mime:2A
#123=Scyther:1A
#124=Jynx:48
#125=Electabuzz:35
#126=Magmar:33
#127=Pinsir:1D
#128=Tauros:3C
#129=Magikarp:85
#130=Gyarados:16
#131=Lapras:13
#132=Ditto:4C
#133=Eevee:66
#134=Vaporeon:69
#135=Jolteon:68
#136=Flareon:67
#137=Porygon:AA
#138=Omanyte:62
#139=Omastar:63
#140=Kabuto:5A
#141=Kabutops:5B
#142=Aerodactyl:AB
#143=Snorlax:84
#144=Articuno:4A
#145=Zapdos:4B
#146=Moltres:49
#147=Dratini:58
#148=Dragonair:59
#149=Dragonite:42
#150=Mewtwo:83
#151=Mew:15

Here are some secret Pokemon:
Note: You get Rainer and Charcolt by putting the code in and the Pokèmon at the top of your list of Pokemon with you will be either Charcolt or Rainer depending on what code you put in (have a useless Pokemon like Pidgey or Ratatta at the top of your list).
#205=Rainer:01C064D1
#248=Charcolt:01E264D1
L11 M4:00C6D8CF
'm : 0000D8CF

Charcolt Stats:The Charcolt is weird; it will evolve into a Missingno. at level 25 and every level up until level 36 where he evolve into a Missingno. and at the same level up it'll evolve into a Spearow every level up.
LV.06:TM09(Makes Charcolt faint every time!)
LV.25:Aurora Beam
LV.32:HM02(Never works!)
LV.36:Mega Punch
LV.36:Agility
LV.44:Haze
LV.48:Pound
LV.62:Razor Wind
LV.100:(Its weird)he levels back into LV.94

And even more codes from Gold & Silver versions:
Pikablu(yes it is Pikablu!):O1E264D1
Mellenuim:01F164D1
Antrax:01BF64D1
Spooky:01F164D1
Locusted:01EF64D1
Beepin:01F464D1
Raticlaw:01ED64D1
Sapasaur:01E764

Pokegods

TRY CODES AT YOUR OWN RISK: GAME SHARK CODES: Flash #174 PIKABLU Put 01E764D1 in your Game Shark then put the switch on your Game Shark to normal.Put a Raichu in the first place of your list.Now put the switch on your Gameshark to on.Now change your Raichu's name to PIKABLU(IN CAPS.) NOTE:Pikablu has many evolutions! #175 LOCUSTOD Put 01E464D1 in your Game Shark then put the switch on your Game Shark to normal.Put a ButterFree in the first place of your list.Now put the switch on your Game Shark to on.Now change your ButterFree's name to LOCUSTOD(IN CAPS.) #205 RAINER Put 01C164D1 in your Game Shark then put in the switch on your Game Shark to normal.Put a Blastoise in the first place of your list.Now put the switch on your Game Shark to on.Now change your Blastoise's name to Rainer(IN CAPS.) #209 TOGEPI Put 01F264D1 in your Game Shark then put the switch on your Game Shark to normal.Put the Pokemon of your choice in the first place of your list.Now put the switch on your Game Shark to on.Now change your pokemon's name to TOGEPI(IN CAPS.) #211 PSYBIRD Put 01E164D1 in your Game Shark then put the switch on your Game Shark to normal.Put the Pokemon of your choice in the first place of your list.Now put the switch on your Game Shark to on.Now change your pokemon's name to PSYBIRD(IN CAPS.) #213 SPOOKY Put 01F164D1 in your Game Shark then put the switch in your Game Shark to normal.Put a Gengar in the first place of your list.Now put the switch on your Game Shark to on.Now change your Gengar's name to SPOOKY(IN CAPS.) #224 RATICLAW Put 01ED64D1 in your Game Shark then put the switch in your Game Shark to normal.Put a Raticate in the first place of your list.Now put the switch on your Game Shark to on.Now change your Raticte's name to Raticlaw(IN CAPS.) #234 POKeMANIAC Put 01C264D1 in your Game Shark then put the switch in your Game Shark to normal.Put the Pokemon of your choice in the first place of your list.Now put the the switch on your Game Shark to on.Now change your pokemon's name to POKeMANIAC(IN CAPS.) #240 SAPUSAUR Put 01E364D1 in your Game Shark then put the switch on your Game Shark to normal.Put a Venusaur in the first place of your list.Now put the switch on your Game Shark to on.Now change your Venusaur's name to SAPUSAUR(IN CAPS.) #245 CHARCOLT Put 01E264D1 in your Game Shark then put the switch on your Game Shark to normal.Put a Charizard in the first place of your list.Now put the switch on your Game Shark to on.Now change your Charizard's name to CHARCOLT(IN CAPS.) #250 ANTHRAX .Make sure your Master Ball you have your Master Ball in your 6th position and that you have only five pokemon with you.Now put 01BFD8CF in your Game Shark then put the Switch on your Game Shark to normal.Now head to a grassy area and put the switch in your Game Shark to on.When you find ANTHRAX use one of your many Master Balls to catch it.When the game asks you if you want to change your pokemon's name say yes and chae yor pokemon's name to ANTHRAX(IN CAPS.) #254 BEEPIN Put 01F464D1 in your Game Shark then put the switch on your Game Shark to normal.Put a BeeDrill in the first place of your list.Now put the switch on your Game Shark to on.Now change your BeeDrill's name to BEEPIN(IN CAPS.) #000 MISSINGNO. Put 0134D8CF in your Game Shark then put the switch on your Game Shark to normal.Now head to an area of grassland an put the Switch on your Game Shark to on.Fight MISSINGNO.,catch it. #151 MEW Make sure you have your Master Ball in your 6th position.Now put 0115D8CF in your Game Shark then put the switch in your Game Shark to normal.Now go to an area of grassland and put the switch on your Game Shark to on.Now use one of your Master Balls to catch MEW #255 MILLENUM Put 01F564D1 in your Game Shark then put the switch in your Game Shark to normal.Put the Pokemon of your choice in the top of your list.Now put the switch in your Game Shark to on.Now change your pokemon's name to MILLENUM(IN CAPS.) GAME SHARK: 01xx64D1 then for: Riun-C1 Sandswipes-C2 Rainer-C5S Pearduck-E1 Spooky-E2 Charcolt-E3 Pikablu-E7 Locustod-E9 Raidon-ED Flareth-F1 Buru-F2 Houou-F4 Nothype-F5 Psybur-01F264D1 Psybird-01E164D1 Raticlaw-01ED64D1 Sapusaur-01E364D1 Beepin-01F464D1 MORE BELOW Hidden Yoshi (Non-Game Shark) Both players need to have beaten the game with all 150 poke'mon for the trick to work The Blue version player trades the Red version player for a Dratini The Blue version evolves Dratini into Dragonite and trades it back to the Red version The Red version uses SURF closest to where Mewtwo was in the Unknown Dungeon Then Red version uses a Fire Stone on Dragonite ( it will say not able but use it anyway) The screen will glitch Dragonite evolves into Yoshi Poke'Gods (GameShark) Locustod (evolved Butterfree) 01E464D1 Rainer (evolved Blastoise) 01C164D1 Psybird -01E164D1 Psybur -01F264D1 Spooky (evolved Gengar) 01F164D1 Raticlaw (evolved Raticate) 01ED64D1 Pokemania -01C264D1 Beepin (evolved Beedrill) 01F464D1 Charcolt (evolved Charizard) 01E264D1 Sapusaur (evolved Venusaur) 01E364D1 Anthrax (evolved Snorlax) 01E364D1 Millenium -01F564D1 Pikablu (Water Pikachu) 01E7D8CF Mew -0115D8CF Cryomew (evolved Mew) Mist Stone