1 D4EE-A766 Start on level 1-2 
2 D7EE-A766 Start on level 2-1 
3 D0EE-A766 Start on level 3-1 
4 D9EE-A766 Start on level 4-1 
5 D1EE-A766 Start on level 5-1 
6 D5EE-A766 Start on level 5-2 
7 D6EE-A766 Start on level 5-3 
8 DBEE-A766 Start on level 6-1 
9 DCEE-A766 Start on level 6-2 
10 EEB5-6404 + EEB5-64A4 Start with full health bar on Standard level 
11 EEB5-6704 + EEB5-67A4 Start with full health bar on Novice level 
12 EEB6-6D04 + EEB6-6DA4 Start with full health bar on Advanced level 
13 EEB6-6F04 + EEB6-6FA4 Start with full health bar on Expert level 
14 DB8F-AD9D Start with up to 9 lives on Options screen (selecting downward from 1 goes to 6) 
15 F38F-AD2D Start with up to 30 continues on Options screen (selecting downward from 0 goes to 3) 
16 C286-A70D Infinite lives 
17 3CEA-67D8 Infinite continues 
18 C236-0DDD No damage taken from punches 
19 C238-0FDD No damage taken from jumping attacks, tail attacks, rushes 
20 DF83-64AF Disc power-ups give 1 disc instead of 6 (handicap) 
21 D783-64AF Disc power-ups give 3 discs 
22 DC83-64AF Disc power-ups give 10 discs 
23 FB83-64AF Disc power-ups give 25 discs 
24 DF8E-6D6F Spear power-ups give 1 spear instead of 6 
25 D78E-6D6F Spear power-ups give 3 spears 
26 DC8E-6D6F Spear power-ups give 10 spears 
27 FB8E-6D6F Spear power-ups give 25 spears 
28 EDCA-0DD4 Spear and disc power-ups last until end of level (can't pick up other power-ups) 
29 C282-6FDF Rhynth meat doesn't add to your maximum health 
30 D08A-6F6F Rhynth meat adds 1/2 as much to maximum health (handicap) 
31 FD8A-6F6F Rhynth meat adds 2x as much to maximum health 
32 4D8A-6F6F Rhynth meat adds 4x as much to maximum health 
33 DD82-67DF Rhynth meat adds nothing to your current health 
34 D082-67DF Rhynth meat adds half as much to current health 
35 FD82-67DF Rhynth meat adds 2x as much to current health 
36 4D82-67DF Rhynth meat adds 4x as much to current health 
37 C28D-A40F Ptera meat doesn't heal 
38 1D8D-A7AF Blue bottles don't heal at all 
39 3C8F-A76F Blue bottles heal 1/2 of your health instead of 1/4 
40 DD84-A4DF Blue bottles heal completely 
41 DFB1-A4D7 Light laser can be fired instantly 
42 F6B1-A707 Medium laser is fired above 3rd line instead of 2nd 
43 D9B5-ADD7 Medium laser can be fired above 1st line 
44 DCB1-A4A7 Medium laser can be fired below 1st line--eliminates light laser 
45 F6B5-AF07 No damage is taken from using heavy laser 
46 DFB5-AD67 Heavy laser can be fired above 2nd line--eliminates medium laser 
47 F6B5-AD67 Heavy laser can be fired above 3rd line (without waiting for bar to change color)

Gameshark Codes
(You need ver. 2.1 or higher)

Infinite Health
0199a3c7 

Infinite HP
0108a1c7 

Infinite Lives
01039fc7