Debug Mode
There are 3 games that use Debug Mode. Sonics 1, 2, and 3. For Sonic 1, press X, X, up, down, left, right. You should hear a chime to confirm the code. Now hold A and press Start. Hold A until Sonic appears. For Sonic 2, play sounds 1, 9, 9, 2, 1, 1, 2, then play 4. (sometimes you might need to do it 2 times in a row) You'll also hear a chime for the code to be right. Now hold A and press Start until the stage begins. (you must use the Stage Select for this code to work)
For Sonic 3, use the Stage Select, highlight a stage and hold A and press Start. After you do one of these codes, you can do one of the following things.
B = change into an item
A = change into a different item
B (again) = change back into Sonic
X = put item on the screen
Tips:
#1: In Sonic 1, you are invincible using Debug Mode
#2: Using Debug Mode on Sonic 2, you can put a lot of rings on the screen, you can turn into Super Sonic very easily.
#3: You can usually change into a big 'glitched' thing. If you place it on the screen, there should be a paddle on top. Jump on it and you automatically pass the stage.
Doctor Robotnik's Mean Bean Machine
Dr. Robotnik's Mean Bean Machine (Easy)
Red, Red, Red, Has Bean - Level 2
Clear, Purple, Clear, Green - Level 3
Red, Clear, Has Bean, Yellow - Level 4
Clear, Blue, Blue, Purple - Level 5
Clear, Red, Clear, Purple - Level 6
Purple, Yellow, Red, Blue - Level 7
Yellow, Green, Has Bean, Blue - Level 8
Yellow, Purple, Has Bean, Blue - Level 9
Red, Yellow, Clear, Has Bean - Level 10
Green, Purple, Blue, Clear - Level 11
Red, Has Bean, Has Bean, Yellow - Level 12
Yellow, Has Bean, Blue, Blue - Level 13
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Dr. Robotnik's Mean Bean Machine (Normal)
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Has Bean, Red, Yellow, Clear - Level 10
Clear, Red, Red, Blue - Level 11
Green, Green, Clear, Yellow - Level 12
Purple, Yellow, Has Bean, Clear - Level 13
Has Bean, Clear, Yellow, Yellow - Level 2
Blue, Clear, Red, Yellow - Level 3
Yellow, Blue, Clear, Purple - Level 4
Has Bean, Green, Blue, Yellow - Level 5
Green, Purple, Purple, Yellow - Level 6
Purple, Blue, Green, Has Bean - Level 7
Green, Has Bean, Clear, Yellow - Level 8
Blue, Purple, Has Bean, Has Bean - Level 9
Dr. Robotnik's Mean Bean Machine (Hard)
Green, Clear, Yellow, Yellow - Level 2
Yellow, Clear, Purple, Clear - Level 3
Blue, Green, Clear, Blue - Level 4
Red, Purple, Green, Green - Level 5
Yellow, Yellow, Clear, Green - Level 6
Purple, Clear, Blue, Blue - Level 7
Clear, Yellow, Has Bean, Yellow - Level 8
Purple, Blue, Blue, Green - Level 9
Clear, Green, Red, Yellow - Level 10
Blue, Yellow, Yellow, Has Bean - Level 11
Green, Clear, Clear, Blue - Level 12
Has Bean, Clear, Purple, Has Bean - Level 13
Dr. Robotnik's Mean Bean Machine (Hardest)
Blue, Blue, Green, Yellow - Level 2
Green, Yellow, Green, Clear - Level 3
Purple, Purple, Red, Has Bean - Level 4
Green, Red, Purple, Blue - Level 5
Blue, Purple, Green, Yellow - Level 6
Blue, Purple, Green, Has Bean - Level 7
Clear, Purple, Has Bean, Yellow - Level 8
Purple, Green, Has Bean, Clear - Level 9
Green, Blue, Yellow, Has Bean - Level 10
Green, Purple, Has Bean, Red - Level 11
Red, Green, Has Bean, Blue - Level 12
Red, Red, Clear, Yellow - Level 13