GameShark Codes for:

Sonic Adventure v1.0

Effect                                   Code

Super Low Time                           BD4E21C800000000
 
255 Emblems                              2087A25F000000FF
 
Enable Big + Super Sonic                 7E1DCB6B00000101
 
Enable Amy + E-102 "Y"                   49DA07A000000101
 
Enable Tails + Knuckles                  274F7B2C00000101
 
Infinite Lives                           86D3964500000009
 
999 Rings                                D3D8989A000003E7