Faster Sonic spins:
Continuously tap X or B to spin faster. 

Play as Super Sonic:
Complete the game using all six starting characters to unlock Super Sonic. Sonic will
transform into Super Sonic after some time into the next game. 

Bonus NiGHTS area:
Drop in the top hole while playing in the pinball section of the casino level to reach
another pinball machine. Place the ball into the middle hole to fly through a warp and
reach an area based on NiGHTS. 

Play as Tails:
Controller two may be used for Tails after he is obtained during game play. Note:
Shields, invincibility and extra life boxes have no effect on Tails if collected. 

Full pause screen:
Pause game play, then press Y + X. 

Hidden Puzzle VMU Game:
Connect a controller with a VMU in its first slot to port D before turning on your
Dreamcast with Sonic Adventure in the drive. You will be able to play a hidden VMU
game called Chao Puzzle on that controller when you start a game.

Alternate Twinkle Park Race views:
Press Up during the Twinkle Park Race level to change views. 

Alternate snowboards:
Press X immediately before entering the snowboarding portion of the game to get a
blue snowboard or B for a yellow snowboard. 

Hidden artwork:
Put the game disc in a PC compatible CD-ROM drive to find additional images from
the game in the "extras" directory. 

Hint: Save a life:
Press Start to pause when falling, and choose the "Restart" option to resume game
play at the last waypoint that was passed. 

Hint: Clone characters:
Play through the game (with all the characters) until Super Sonic is unlock. In Super
Sonic's Adventure, go to the crashed island. You will see Knuckles and Eggman
(Robotnik). After the FMV sequence, press A + B + X + Y + Start. Then, choose
Knuckles. Return to the same place to find two Knuckles. Note: This also can be done
with other characters. 

Hint: Defeating the whale:
When on the whale stage(s), run over a speed ramp as soon as it appears. Then, do
not press anything on the controller; the CPU will do the rest.

Hint: Defeating Chaos 6:
Wait until Eggman drops his freeze bombs. Then, use the homing signal to turn his
bombs into eggs and throw them into Chaos' mouth. He should freeze. When he does,
attack him. Repeat this as many times as needed.

Hint: Hurt Perfect Chaos at less than maximum speed:
You can hurt Perfect Chaos without going top speed, although you have to be fast. Go
onto the road and speed up. Stop moving during that until you are not in a Blue Shock
ball, then quickly move into Chaos. If done correctly, you will hurt him without going at
maximum speed.

Hint: more than one Gold, Metallic, or Black Chao with one memory card:
First, get a Chao that you want more than one of (whether it is the gold or silver). Then,
bring the Chao to a Chao Garden and put it into your memory card. After it has saved,
turn off your Dreamcast, then turn it back on. Go to the Chao Garden and take it out.
Go back to the place where you got the Chao and repeat this until your Chao Garden
is full or you do not want any more of them.

Hint: Super Sonic Chao:
Raise a Golden Chao and give him all the animals to make the Chao look like Sonic.
The Chao should look like a Golden Sonic, which is Super Sonic. To make him like a
real Super Sonic, raise all of his stats to 999.

Hint: Chao moods:

Heart: Happy
Swirl: Angry
Question Mark: Confused
Exclamation Mark: Surprised
XX over eyes: Angry
-- over eyes: Happy
Half Closed eyes: Tired
Waving Arms: Wants Attention
Flailing Arms: Angry 

Hint: Silver Chao egg:
Go to the Mystic Ruins. Go to the water fall located in the middle of the Adventure
Field. Push the stone that is jutting out of the wall to the right of the water fall. A silver
egg will fall from behind the waterfall and float to shore. When it hatches, a silver Chao
will be born.

Hint: Golden Chao egg:
Go to the Station Square area. Then, go to the area when you fought Chaos for the
first time. Look to the side of the City Hall entrance to find egg shaped rock. Take the
rock to the building to the left from City Hall. Walk to the window to see a golden Chao
egg. However, if you try to take it the front door will lock. Replace the egg with the rock
and the door will unlock, allowing you to leave with the egg. When the egg hatches you
will have a golden Chao.

Hint: Black and blue Chao egg:
Go to the egg carrier. Then, go the jail area where Amy was kept. In the cell next to
where she was held is a black and blue egg. Step on the switch to open the door.
Take the egg to the garden. When it hatches, it will be a dark grey and dark blue
Chao.

Hint: Special Chao:
Collect at least 100 emblems to get access to a special section called the Black
Market on the Dreamcast Network. A Special Chao can be downloaded from this
area.

Hint: Get all five Chaos Emeralds with the Chao:
To get all five of the Chaos Emeralds that you can get with the Chao, you need to log
on to the Dreamcast Network and go to the Chao Daycare Section. Download one of
the Chaos that are 999 in all four categories. Return to your Chao Garden and race
him in a Chao Race. He will leave easily defeat all the other Chao. Repeat this on all
five races to get the five possible Chaos Emeralds.

Hint: Copy Chao:
Place the VMU with the Chao in socket 1 and the destination VMU in socket 2. Enter
the Chao Garden, then leave the Chao Garden. After the "Now Saving" message,
look at the data on the VMU. If done correctly, it will have Chao data. Note: The VMU
will not have the Chao Game on it. This can be fixed by taking your copied chao out of
the VMU, and putting it in the Chao Garden. Then, put the Chao back in your VMU. 

Hint: Alternate Chao copying:
To copy a single Chao, you have to have at least one VMU and one memory card. You
have to chose the memory card to save your game onto and not the VMU. Go into any
of the gardens and pause game play. Then remove the memory card from the
controller. Pick up the Chao you want to clone and put it into the VMU. After it is in the
VMU, do not put the memory card back into the controller. Instead, just shut off the
game so it cannot save it. When you start the game again, the Chao should be in the
garden and in the VMU. 

Hint: Copy up to 24 Chao at once:
Note: A mega memory card is required for this trick. Choose the game on the MMC
with the Chao you want to copy (all twenty four in the three gardens). Go into any
garden and pause game play. Switch the port on the back of the MMC to the game
that you want to put the Chaos in. Caution: The copied Chaos will remove any of the
other Chaos in the game you switched it to. After switching the ports, resume the
game and exit the garden. After it finishes saving, you should turn off the game. The
copying of Chaos does not affect the game itself, only the Chaos in the gardens. 

Hint: Super Chaos:
There are four special evolutions possible for the little Chao creatures: the Sonic,
NiGHTS, Alien, and the Dragon. After giving a normal Chao so many certain colored
animals it will evolve into one of these. After the first evolution, keep giving it more of
the same colored animals. Its new features will continue to grow. If you give it different
colored animals, they will shrink. 

Hint: Sonic The Armadillo:
Go to the past when the Master Emerald altar is on fire. Move the camera so Sonic is
facing the screen head on. In the red light, he looks just like Mighty The Armadillo from
Knuckles Chaotix game on the Sega 32X.

Hint: Super character colors:
Get all emblems in trial mode with all charcters to unlock Super Tails, Super Gamma,
Super Amy, Super Big, and Super Knuckles. If you want to see their original colors
again, you will have to delete the trial mode files. Sonic is gold, Knuckles is black, and
Tails is still orange but has some blue.

Hint: Get Big The Cat early:
Play as Sonic in a new game and start the Windy Valley level. Go to Station Square
and go outside to where the boat that leads to Egg Carrier is located. Big will be next
to it. Walk up to him, press Action, and he will say "Froggy, where are you?". You will
then have Big The Cat as a new character.

Hint: Mystical Ruins extra life:
Tail's workshop is located all the way at the top of the mountains in the Mystical Ruins.
Go to the very top and look around to find an extra life. Use the spin attack to zoom
over and collect it.

Hint: Easy coins with E102 Gamma in Adventure field:
Go to station square and in the hotel, go up the stairs to the second floor. Stand at the
very top step. Shoot your laser at the second button on the floor. Keep shooting to get
coins. 

Hint: Easy coins with Tails:
Find a patch of dark green grass. Move over and stand on it, then twirl your tail
around. A group of coins will appear out of nowhere.

Hint:: Easy coins with Knuckles:
When inside the hotel, go upstairs to the switch to make coins appear. Then, stand on
it with Knuckles and repeatedly press X.

Go to almost any spot of dirt or grass, then press A + B to dig down and come up with
many coins.

Hint: Easy rings for Knuckles:
Go into to the entrance for Red Mountain, but do not go in all the way inside. Dig at the
entrance and many rings will almost always appear.

Hint: Take a shower:
Go to the Casinopolis zone as Sonic and enter the shower area. Get into one of the
stalls and push against the wall to give Sonic a shower.

Hint: Power-up locations:

Sonic
Light Speed Shoes: Sewer in Station Square.
Crystal Ring: Elevator on second floor of hotel.
Ancient Light: On rock near bridge to Angel Island. 

Tails
Rhythm Badge: Follow Tikal to past (it is on a pyramid)
Jet Anklet:In the sewer behind Twinkle Park. 

Knuckles
Fighting Glove: In the cave near Angel Island.
Shovel Claw: On a cliff behind Big The Cat's house. Go to the Mystic
Ruins and go to the ledge where you entered the level. Turn to your right.
The Shovel Claw can be found right above Big The Cat's house. They
allow Knucles to do an attack similar to Sonic's Homing attack.

Amy
Warrior Feather: Defeat Hedgehog Hammer for the first time. 
Long Hammer: Defeat First Place score again. 

Big The Cat
Life Belt: In the lake in the cave leading to Angel Island. 
Power Rod: In Forest under Big's bed.
Lure 1: In Sewer Behind Twinkle Park.
Lure 2: In a cave in the Forest.
Lure 3: In the Icecap level.
Lure 4: In a prison cell on the Egg Carrier. 

E-102 Gamma
Jet Booster: In the Ammunition Room of the Egg Carrier.
Gun Upgrade: In the room opposite the Ammunition Room. 

Hint: Getting every Emblem:

Sonic: 30 emblems to collect in Sonic's Action Stages.
Tails: 15 emblems to collect in Tail's Action Stages.
Knuckles: 15 emblems to collect in Knuckles Action Stages.
Amy: 9 emblems to collect in Amy's Action Stages.
Big the Cat: 12 emblems to collect in Big's Action Stages.
E-102 Gamma: 15 emblems to collect in E-102's Action Stages.
Adventure Field: 12 emblems to find in Adventure Field.
Mini Games: 10 emblems to collect in Mini Games.
Chao Races: 5 emblems to collect in Chao Races.
Complete the game with all six characters to get 6 emblems.
This brings the total number of emblems that are collectible in the game to
130. 

Hint: Train Station Sonic Emblem:
There is a Sonic Emblem in the S.S. Train Station that you can get with Tails. But
there is also a way to get it with other characters (except perhaps Big). As you walk in,
the Sonic Emblem is right above you. Walk to the train but do not go in. Instead, head
right or left. There should be a small ledge, or railing there. Use the ledge to walk to a
loft type object. That is where the emblem is located. 

Play as Knuckles and go to the other side of Station Square. Go to the hamburger
place where the women wanted to make out with the man. There are four trees on
each side. Go the right and dig in the middle of the tree to find an Emblem.

Hint: Change Station Square appearance: 
Connect to the Dreamcast Network through the Sonic Adventure disc and download
the new file.

Hint: Go up the mountain as Tails:
It is possible to go up the mountain as Tails in level 3. Aim Tails up and keep pressing
Up while jumping. It is difficult to tell what Tails is doing, but this is a good way to pick
up arches that were missed. 

Hint: Hitching a ride:
To get a ride, stand in front of the car, then jump on top of the car. You can go
anywhere in Station Square except for the hotel parking lot. 

Glitch: Accidental game deletion:
Warning: Do not turn off the game at the following places or your entire game will be
erased.

Chao Garden (While saving)
In an Action Stage 

Glitch: Sonic in the sand hill:
Get on top of the ledge and pushing the button to drain the sand. Locate the sand hill
cave, but do not enter. Move a short distance back out of the cave entrance. Charge
up your speed of light dash, but not to the point where he says "Ready". Release, then
jump immediately before you go over the little bump or lip. If done correctly, Sonic will
end up in the sand hill. Note: It is just like the sand hill in trial mode.

Glitch: Giant characters:
Go to the Mystic Ruins as any character. Walk on to the platform by the train. Jump on
the train and have your character face the sea. Rotate the view so that the character is
facing you. It now should appear as if the character has grown to immense size on the
platform.

Glitch: Skip Egg Carrier loading time: 
There is a way to skip the loading time on the stairs on the docks at the Egg Carrier.
First, go to the dock. Angle Sonic so that he is on the opposite side from the boat.
Then, jump diagonally on to the stairs and keep jumping up to get to the top. For fun,
jump off the stairs to see Sonic float for a bit. You still cannot get to top because of
loading time, so jump diagonally onto the Egg Carrier. 

Glitch: Upside-down Knuckles:
When playing as Knuckles, fly in a circle by rotating the Analog-stick
counter-clockwise. Do this as many times as possible, until Knuckles turns
upside-down.

Glitch: Go through wall:
Go to the Chao Garden in the Mystic Ruins with Knuckles. Go the VMU area, and look
at the VMU model. There is a wall behind it. Jump off and glide to that side of the wall
to go through it.