Sonic Advance/Hidden content

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Tails as Sonic's partner

On the character select screen, highlight Sonic, then press . Tails will now follow Sonic similar to how he did in Sonic the Hedgehog 2 and Sonic the Hedgehog 3.

Build dates

Located at ROM addresses $7F8F4C (JP v1.0), $7F8F48 (US), $7FF02C (EU) and $7F9078 (JP v1.1):

JP v1.0	0.69Wed Oct 31 18:01:36 2001
US	0.69Wed Oct 31 18:32:29 2001
EU	0.71Wed Nov 21 13:22:30 2001
JP v1.1	0.72Thu Dec 20 16:05:10 2001

Cheat device codes

These are cheat codes that can only be used with game enhancer devices. Support for these codes is available in most emulators.

Codebreaker

Official codes, US version

Code	Effect	Reference
0000FFE5 000A + 1000122A 0007	Enable Code (Must Be On).
83005034 0001	Get Best Time For The End Of A Zone.
83004FEC 03E7	Infinite Rings.
33005024 000A	Infinite Lives.
83005030 FFFF	Quick Score Gain.
83005030 967F + 83005032 0098	Max Score.
33005078 00FF	Max Rings (Special Stage).
3300517C 007F	Have All Chaos Emeralds.
33005A46 0001	Normal Shield Effects (You dont see the shield, but its there).
33005A56 0008	Lightning Shield Effects (You dont see the shield, but its there).
33005084 0000	Play As Sonic.
33005084 0001	Play As Tails.
33005084 0002	Play As Knuckles.
33005084 0003	Play As Amy.

To use one of the following level select codes, first you must go to any zone and die:

Code	Effect	Reference
3300514C 0000	Neo Green Hill Zone Act 1.
3300514C 0001	Neo Green Hill Zone Act 2.
3300514C 0002	Secret Base Zone Act 1.
3300514C 0003	Secret Basel Zone Act 2.
3300514C 0004	Casino Paradise Zone Act 1.
3300514C 0005	Casino Paradise Zone Act 2.
3300514C 0006	Ice Mountain Zone Act 1.
3300514C 0007	Ice Mountain Zone Act 2.
3300514C 0008	Angel Island Zone Act 1.
3300514C 0009	Angel Island Zone Act 2.
3300514C 000A	Egg Rocket Zone Act 1.
3300514C 000B	Cosmic Angel Zone Act 2.
3300514C 000C	X-Zone.
3300514C 000D	The Moon Zone.
3300514C 000E	Forest Chao Garden.
3300514C 000F	Factory Chao Garden.
3300514C 0010	Pinball Chao Garden.
3300514C 0011	Space Chao Garden.
33005A3C 0010	Invincibility.
33005A7A 000C	Infinite Air.

Code	Effect	Reference
0000FFE5 000A + 1000E086 0007	Enable Code (Must Be On).
820002F8 207F + 820002FA 0200 + 820002FC 6008 + 820002FE 1C08 + 82000300 E015 + 82006626 3000	Infinite Rings.
820044A6 2063	Quick Stat Level Up.

Action Replay V3

Unofficial codes, US version

Code	Effect
84E37E9F 7366A900 + 65DA389A 09D8882C + EF2FCCA1 B6809375 + 65DA389A 09D8882C	All Characters Can Play With Tails.
78FA03A8 24E302D8 + CDE8AE47 E0DF7372 + 80F4C951 DD8D8BC8 + CDE8AE47 E0DF7372 + 8B6BB800 845BD904 + 2CF7DFF8 5EA41279	Always Swim.
39DBF14E 3E49F34D + 65DA389A 09D8882C	Bypass Special Stage Limit.
24DB9BF3 FDEB152E + 65DA389A 09D8882C	Disable Death.
5E22473D 0B02AE9A + 34F4199F AA6BDBE3	Don't Lose Rings When Hit.
4344F523 B67B9499 + 14551F08 02AD46B7	Infinite Flight.
877F0F33 CDE51C4A + EF0BDE0E D0FA5876	Moon Jump.
BE6461DA 00A4FD48 + 14551F08 02AD46B7	Rings don't deplete when hit.