This game is a lot about reacting and punishing, so I think it would be great if we had a thread here compiling all this information. I'll compile all the contribuitions in this OP, with the due quote. Also, please comment on wrong information and post the correct one in that case.
- How to punish spiral arrow (Cammy) on block: light and medium spiral arrow are -17 on block. heavy spiral arrow is -15 and ex spiral arrow is -10. You can punish all those with 9 frames startup moves or faster. Use faster moves, so you don't risk missing. Combo out of it.
yoga fyah contribution: however Cammy can space the spiral in such a way that it makes contact (blocked) in its last active frames, making the punish window tighter and in some cases safe even.
- How to punish spin knuckle (Cammy): spin knuckle is positive on block, all of it's version. Also all of it's version are NOT invulnerable, so you can hit her before she hits you. Wait for her to touch the ground (before the punch), so you can combo out of what you do to hit her.
- How to punish hooligan (Cammy): Just do an anti-air and you will hit her out of it.
4neqs contribution: You can crouch it most of the time, then punish as she recovers.