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Debug mode:
Press Up, C, Down, C, Left, C, Right, C, Start, then hold A at the title screen. Continue to hold A until game play begins. Screen coordinates will appear instead of a score and the number of objects displayed will appear instead of the time remaining. Use one of the following controller actions to enable the corresponding debug code. Note: This code may only be enabled on the first version of the game.
Object transformation:
Press B during game play to change Sonic into a game object. Press A to change into a new object. Press C to place an object on the screen. Press B again to revert back to Sonic. Note: The type of object that may be selectable will vary from level to level.
Invincibility:
Sonic is, by default, invincible in debug mode.
Slow motion
Pause game play and hold B.
Restart
Pause game play and press A.
Frame advance
Pause game play and press C.
Master code:
ATBT-A32A
Alternate code: ATBT-AA32
Never lose rings:
AWHA-CA92
Rings worth 2:
SCGT-DJYL or SCRA-BJX0
Rings worth 3:
3SCGT-DNYL or SCRA-BNX0
Rings worth 4:
SCGT-DTYL or SCRA-BTX0
Rings worth 5:
SCGT-DYYL or SCRA-BYX0
Rings worth 6:
SCGT-D2YL or SCRA-B2X0
Rings worth 7:
SCGT-D6YL or SCRA-B6X0
Rings worth 8:
SCGT-DAYL or SCRA-BAX0
Super Ring power-up worth 50:
GL5A-CAHN
Super Sonic does not lose rings:
AJZA-CA8N
Unlimited lives:
AJ3A-CA7A
Start with 99 lives:
NR4T-AAH4
Invincibility lasts forever:
AJRT-CA8R
Blue Spheres worth 8:
SCGA-BCON
A4GA-A28T
One Blue SP here needed for Chaos Emerald:
RGGA-A60T
Much higher jump:
NAYA-C8B6
Never drown:
ATST-CA38
Only one ring to become Super Sonic:
AEYT-CAHO
Jump to end sequence:
GJBA-AA4G
Invisible rings:
DTLT-AAGL
All hidden items and breakable walls visible:
AEMT-BJB0
Remaining scenery will be scrambled; use to discover secrets.
Once invincible, stay invincible:
AE0T-ABEA
Level select menu:
AJ3A-AA4G
Start with one life:
AE3T-ACLA
Disembodied Sonic at title screen:
AY3T-AACE
Start at title resets to "Sonic Team Presents...":
AE3T-AA4G
Start with 1 life:
AE3T-AACL
Start with 5 lives:
AY3T-AACL
Start with 5 chaos emeralds:
AY3T-BA4R
Delayed and repeated ring sparkle when collected:
SCRA-BJXG
Freeze rings when touched:
SCRA-BJXL
Rings do not sparkle when collected:
SCRA-BJXR
Bounce off rings:
SCRA-BJXT
Collect a ring, and your total will not stop rising:
SCRA-BJXW
Collected rings replaced by solid rings that may being stood on:
SCRA-BJXY
Each ring is worthless:
SCRA-BFX0
Maximum rings collected is 10, except from monitors:
SCRA-BJX2
Jump down through floors:
DDLT-AAGG
Disable this code for a normal jump.
Zero gravity:
ADLT-AAGL
Asteroid gravity:
A5LT-AAGL
Jump higher:
BDLT-AAGL
Jump higher:
DDLT-AAGL
Lower jump:
KDLT-AAGL
Keep shows for remainder of level once collected:
KDLT-AAGL
Slightly higher gravity:
LDLT-AAGL
Higher gravity:
NDLT-AAGL
Extremely high gravity:
9DLT-AAGL
Invisibility:
FJ0A-C6BJ
Slower Sonic:
960A-CABR
Faster Sonic :
960A-C6BR
Cannot move left or right:
960A-CABT
Sonic is slow to reach full speed:
AE0A-CABY
Reach full speed instantly:
960A-CABY
Unable to stop:
AA0A-CAB4
Stop instantly:
960A-CAB4
Some items disappear, and other items reappear after hit:
AE0T-CABA
Once invincible, stay invincible for the rest of level:
AE0T-CABE
Running shoes increase your max run speed for the rest of the round:
AE0T-CAB2
Unlimited lives (alternate):
GJ6A-CA5T
Game Over will be displayed after every life obtained.
Unlimited lives (alternate):
GJ6A-CA7A
Simply disappear when losing a life:
GJ6A-CA6A
High jump when losing a life:
GJ6A-CA6N
Stay standing in S-curve tunnels; cannot run loops:
AE6T-CABY
Gives Sonic and Tails have purple hair:
A7J2-AAAA
A7J2-AAAA
C1M4-A210
