Sonic Adventure Cheats

Chao Garden Tip
Using Sonic, in the hotel hold down X until sonic glows light blue. Then, go into the lift to the Chao Garden, as it is about to leave let go and shoot out of the lift into the wall. The screen will then go black and you will be in the Chao Garden.
Submitted by William_Parr. Did this cheat work for you? [Yes] [No].

Dig for Items
Using Knuckles, go down the path to angel island. If you dig in various spots items will come up, like the shield or and extra life. In some spots you can earn coins as well.
Submitted by Michael_Littlefield. Did this cheat work for you? [Yes] [No].

Going Down at Dawn
Tails can play going down and at dawn. First go to the first checkpoint and look straight ahead. You should see a road. Go on it. To do that jump on the ledge and fly to it. Now your on the road. Go on the speed thing. When you reach the highest height fly right. You should go through the building. Fly to the white tunnel. Go on top of it. You should go through that to. go to the picture. You made it! At the end of the going down your at dawn. (This is a bug).
Submitted by Kyle_Bergman. Did this cheat work for you? [Yes] [No].

Infinite Special Chao
To have infinite gold, silver and black chao go to where ever a special chao is. Then, hatch it and start a new game. Go where ever you got your special chao and get another one and hatch it. Do this to have unlimited special chao.
Submitted by Kyle_Bergman. Did this cheat work for you? [Yes] [No].

Play as Super Knuckles
To play as Super Knuckles, beat the game with every character. Then, at the character select screen go to Knuckles and hold down the X and B buttons until Knuckles gives you the thumbs up.
Submitted by Adam_Green. Did this cheat work for you? [Yes] [No].

Play as Super Sonic
Beat the game with every character to unlock Super Sonic.
Did this cheat work for you? [Yes] [No].

Secret Place on Egg Carrier
After you beat the game go to the egg carrier with sonic or tails and go to the room where you transform the ship then push the button inside then go out and the room should be risen, then there should be 2 other doors go in the one in the middle one and you should appear in Eggman's secret place and there is a button inside push it and a bed should pop out and there is an emblem above.
Submitted by Nick. Did this cheat work for you? [Yes] [No].

Sonic Chao
Give a chao about 20 animals (apes, parrots, elephants) and it will start to look like Sonic.
Submitted by Kyle. Did this cheat work for you? [Yes] [No].

Special VMU Game
Plug in VMU unit into the controller. After turning the game on take the controller out of port A and put it into port D. A special Chao puzzle game will appear. Each time you beat 5 puzzles a special scene will appear on your VMU unit.
Submitted by Payne Rains. Did this cheat work for you? [Yes] [No].

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Note: Because nGaming does not have all games for Sega Dreamcast, it is not possible for us to verify that each of the Sonic Adventure cheats above is correct. If any of the cheat codes, tips, hints, glitches, walkthroughs, FAQs, easter eggs or unlockables listed above is incorrect, please rate the cheat using the link just below the cheat information. Please note that in a minority of cases, some cheats will only work in certain versions (PAL, NTSC etcetera) of the game. Also, please be aware that it may be the case that nGaming does not yet have all of the Sonic Adventure cheats yet - if you know any hints or tips for Sonic Adventure on Dreamcast, we would greatly appreciate it if you could submit the cheat so we can add it to our database.