1.How do I get a super sonic chao in SA2 battle? 2.How do I get a chaos chao? thanks
1. There is no official Super Sonic chao. Try hatching a chao from a gold or shiny yellow egg (or even breed the two) and raise it as a Dark-Running-Running chao. It will actually be a Shadow chao, but it will look somewhat like Super Sonic.
2. This has been answered previously. Check the Q&A archives for instructions.

~ Crazy C Lea