Yes, you can.
You need a GBA and GCN to GBA cable.
You can't without hacking
Well you can't without hacking
find the chao key with tails.
The chao can wear it as a hat. In SA2B your chao will need to have been given a skeleton dog at some point to allow it to wear hats.
SA2 is for the Dreamcast, while SA2B is for the GameCube. SA2 has Big cameos in the level, SA2B does not.(SA2B only has cut scene cameos but so does SA2.) SA2B has more 2 player stages than SA2. SA2 allows you to put your chao in the VMU, SA2B allows you to put your chao in the Tiny Chao Garden. SA2B has Chao Karate. some chao world structure is different.(dark garden is TOTALLY different.) There are more.
The only way you can get a Tails Chao and an Amy Chao in SA2B without Action Replay is by via hacking.
yes there is i think
No. lawl no.
No, Jewel Chao cannot be two tone
No,you cannot.The truth is,that Knuckles Chao never existed in the U.S.A version of Sonic Adventure 2 Battle.They only existed in Tokyo,Japan.BUT,the only way you can obtain a Knuckles Chao in SA2B is via hacking.
it depends on the kind of egg.
You have to trade one from sonic advance or sadx