Either with Action Replay or owning Phantasy Star Online
Use action replay
The only way you can get a Tails Chao and an Amy Chao in SA2B without Action Replay is by via hacking.
Pet a newborn chao with hero characters. (Sonic Tails Knuckles)
Sonic Adenture 2 is the original game for the Dreamcast and Sonic Adventure 2 Battle is a remake for the Gamecube. Sonic Adventure 2 Battle has better graphics, chao karate class, chao activities and chao shops.
Sonic adventure battle 2
Yes there are chaos in sonic adventure 2 battle
Gold chao can only be found in sonic advance for the gameboy advance. Then you put it on sonic adventure battle
Sonic Adventure Battle (DC/GC) and Sonic Adventure Battle 2 (DC/GC)
No
There is no chao island. sorry.
No the chao gets sonic hair.
You Can In Sonic Adventure 2 Battle. I Think you can in DX.