This is where you can find GameShark codes. Please remember that each character and card isn't obtained. They're simply mods. First you must go to the character equip screen, turn the code on, then select a character you want to use. Then exit the screens to the menu, turn the code off now and you'll have the character selected.
Here's a list of characters for your GameShark.
Character
Code
Gohan-Norm
010101CC
Gohan-SS
010201CC
Gohan-SS2
010301CC
Piccolo-Norm
010401CC
Piccolo-God
010501CC
Piccolo-Evil King
010601CC
Krillin
010701CC
Goku-Norm
010801CC
Goku-SS
010901CC
Goku-SS2
010A01CC
Goku-SS3
010B01CC
Vegeta-Norm
010C01CC
Vegeta-SS
010D01CC
Vegeta-Majin
010E01CC
Teen Gohan-SS
010F01CC
Teen Gohan-SS2
011001CC
Teen Gohan-Mystic (aka Strongest)
011101CC
Future Trunks-Norm
011201CC
Future Trunks-SS
011301CC
Goten
011401CC
Goten-SS
011501CC
Young Trunks
011601CC
Young Trunks-SS
011701CC
Gotenks-SS
011801CC
Gotenks-SS3
011901CC
Vegito-SS
011A01CC
Nappa
011B01CC
Guldo
011C01CC
Recoome
011D01CC
Jeice
011E01CC
Burter
011F01CC
Ginyu-Norm
012001CC
Ginyu-Goku
012101CC
Freeza
012201CC
16
012301CC
17
012401CC
18
012501CC
19
012601CC
20
012701CC
Cell-First Form
012801CC
Cell-Second Form
012901CC
Perfect Cell
012A01CC
Cell Jr.
012B01CC
Fat Buu
012C01CC
Evil Buu
012D01CC
Buu-Gotenks
012E01CC
Buu-Gohan
012F01CC
Buu-Pure Evil
013001CC
Now here's some GameShark codes for cards.
Card
Code
3 Stage Attack
0102F3CD
4 Stage Attack
0102F4CD
5 Stage Attack
0102F5CD
6 Stage Attack
0102F6CD
Continuous Punch
0102F7CD
Continuous Kick
0102F8CD
Energy Wave
0102F9CD
Energy Bomb
0102FACD
Speacial Cart
0102FBCD
Masenko
0102FCCD
Dunk Shot
0102FDCD
Kamehameha
0102FECD
Super Kamehameha
0102FFCD
F. Kamehameha
010200CE
Sonic Kick
010201CE
Resurrect
010202CE
Special Beam Cannon
010203CE
F. Lightbomb
010204CE
Taiyoken
010205CE
Misty Ki Wave
010206CE
Desturct-Disc
010207CE
Super Destruct-Disc
010208CE
Kaio Ken
010209CE
Spirit Bomb
01020aCE
Solid Shot
01020bCE
Teleport
01020cCE
Super Saiyan 2
01020dCE
Super Saiyan 3
01020eCE
Tail
01020fCE
Galick-Ho
010210CE
Big Bang
010211CE
Final Flash
010212CE
Desperate Attack
010213CE
Rising Kick
010214CE
Burning Attack
010215CE
Final Attack
010216CE
Flash Punch
010217CE
Kamekameha
010218CE
Galactica D.
010219CE
S.G.K Attack
01021aCE
Buu Ball Slam
01021bCE
Kiai
01021cCE
Atomic Break
01021dCE
Flash Sword
01021eCE
Barrier
01021fCE
N. Slasher
010220CE
Ki Blast Bomb
010221CE
Light Cannon
010222CE
Telekinesis
010223CE
Mystic Sound
010224CE
Paralysis
010225CE
Time Freeze
010226CE
Breath
010227CE
Eraser Cannon
010228CE
R.F.B. Attack
010229CE
Crasher Ball
01022aCE
Purple Comet
01022bCE
P. Comet Z
01022cCE
Speed Up
01022dCE
Mach Attack
01022eCE
Dynamite Punch
01022fCE
Body Change
010230CE
Finger Beam
010231CE
Super E-Ball
010232CE
Grand Wave
010233CE
S. Dash Elbow
010234CE
Eye Beam
010235CE
Lock On
010236CE
Rocket Punch
010237CE
Hell Flash
010238CE
Crazy Rush
010239CE
Energy Slash
01023aCE
Energy Slice
01023bCE
18's Attack
01023cCE
Life Absorb
01023dCE
Energy Absorb
01023eCE
Cell Combo
01023fCE
Step up Attack
010240CE
Flesh Guard
010241CE
Potbelly Attack
010242CE
Crasher Buu
010243CE
Sweet Beam
010244CE
Bulma
010245CE
Chiaotzu
010246CE
Tien
010247CE
Yajirobe
010248CE
Kaio
010249CE
Dende
01024aCE
Guru
01024bCE
Hercule
01024cCE
Supreme Kai
01024dCE
Kibito
01024eCE
Babidi
01024fCE
Dabura
010250CE
Yakon
010251CE
Scouter
010252CE
Caps. Fridge
010253CE
Stop Device
010254CE
Life Preser
010255CE
Medical Mac.
010256CE
Gravity Device
010257CE
Energy Absorber
010258CE
Sealed Ball
010259CE
Trunks' Sword
01025aCE
Dabura Spear
01025bCE
Light Vest
01025cCE
Btl. Jacket
01025dCE
New B-Jacket
01025eCE
Sunglasses
01025fCE
Gamebomb
010260CE
Champ. Belt
010261CE
Special Candy
010262CE
Heart Virus
010263CE
Heart Medicine
010264CE
Sandglass
010265CE
Naughty Book
010266CE
Full Spirit
010267CE
Afterimage
010268CE
Reading Ki
010269CE
Feint
01026aCE
Endurance
01026bCE
Telepathy
01026cCE
Foresight
01026dCE
Shockwave
01026eCE
Avoiding
01026fCE
Still not enough for you cheaters? :P Well then I have codes for Infinte HP and CC.