Get 105 Of Any Item
Do the Missingno trick.if you dont know how to do it you got tot he guy in Vermilion city that shows you how to catch a weedle and thenfly to Cinnabar Island go to the right and surf up and down the cost and you should run into a missingno. Be warned he might erase your game even bye seeing him!.
Rare Pokemon Twice
The trick if you want to catch those hard pokemon like in the Safari zone the Seafoam islands is where you sould go just go to the place of where the pokemon has its nest or where it lives and then go the Island and swin along the coast and you find those rare pokemon.
To Find Pokemon over the level 100

When i was doing the missingno trick i had came across a Snorlax at level123 and i was like yessssssss because i had killed the other two when i had the chance, another pokemon the i have found is squirtle a golbat and a zubat.Could it be that if you pick another pokemon at the begining that you can find diffrent pokemon?


Item Codes
Use 01xx7ccf and replace the xx with the item you want to buy:
01 Master Ball
02 Ultra Ball
03 Great Ball
04 Pokéball
05 Town map
06 Bike
07 Surf without pokemon
08 Safari Ball
09 Pokedex
0A Moon Stone
0B Antidote
0C Burn Heal
0d Ice Heal
0F Parlyz Heal
10 Full Restore
11 Max Potion
12 Hyper Potion
13 Super Potion
14 Potion
15 Boulder Badge
16 Cascade 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
2D Bike Voucher
2E X Accuracy
2F Leaf Stone
3A Dire Hit
3B Coin
3C Fresh Water
3D Soda Pop
3E Lemonade
3F S.S Ticket
30 Card Key
31 Nugget
32 PP Up
33 Pokédoll
34 Full Heal
35 Revive
36 Max Revive
37 Guard Spec
38 Super Repel
39 Max Repel
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 Poké Flute
4A Lift Key
4B Exp. All
4C Old Rod
4D Good Rod
4E Super Rod
4F PP Up (for free)
50 Ether
51 Max Ether
52 Elixer
53 Max Elixir

C4 HM 01
C5 HM 02
C6 HM 03
C7 HM 04
C8 HM 05
C9 TM 01
CA TM 02
CB TM 03
CD TM 04
CE TM 05
CF TM 06
D0 TM 07
D1 TM 08
D2 TM 09
D3 TM 10
D4 TM 11
D5 TM 12
D6 TM 13
D7 TM 14
D8 TM 15
D9 TM 16
DA TM 17
DB TM 18
DC TM 19
DE TM 20
DF TM 21
E0 TM 22
E1 TM 23
E2 TM 24
E3 TM 25
E4 TM 26
E5 TM 27
E6 TM 28
E7 TM 29
E8 TM 30
E9 TM 31
EA TM 32
EB TM 33
EC TM 34
ED TM 35
EE TM 36
EF TM 37
F0 TM 38
F1 TM 39
F2 TM 40
F3 TM 41
F4 TM 42
F5 TM 43
F6 TM 44
F7 TM 45
F8 TM 46
F9 TM 47
FA TM 48
FB TM 49
FC TM 50

Pokemon Babysitter
For every step you take your pokemon will get 1 exp up.

How to get Yoshi
No sure if it works..... To do the trick you need: 2 gameboys, 1 gameboy link cable and both versions of pokemon (blue and red, both must have been beaten and have 150 or 151pokemon. 1)get a Dratini on the red version and trade it to the blue version. 2)have the blue version evolve it to a dragonite. 3)then, trade it back to the red version.4)go to the unknown dungeon 5)SURF around where Mewtwo is caught.6)then, use a fire stone on Dragonite dragonite should evolve into Yoshi its a glitch...