You need to obtain one by via PIE. *ahem*.... hacking
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.
If your chao has fly over 100, place it somewhere high facing you, then use either knuckles or tails and fly, make sure that your chao sees it. If it watched you it should be able to fly.
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.
yes there is i think
You can't without hacking
No. lawl no.
No, Jewel Chao cannot be two tone
You have to trade one from sonic advance or sadx
it depends on the kind of egg.
Well you can't without hacking