yeah when you land a vc on her, make sure you land the infinite. its a hard fight for cody. its no suprise that cody is hella crossup bait. he dies to crossup into gc tactics all day since he has no reliable wakeup and a short guard bar. only way to effectively stop her jumpins is early s.rh. thats what i do. sometimes a well placed c.strong AA into rh ruffian(or wiff short ruffian to give you setups) will work against her but its not reliable against her. if i play against a really good chun, i pray i dont fuck up vc into infinite. you cant really outpoke her. you can counter poke with s.forward. s.short counter hit xx short ruffian works well for me. it suprisingly beats a lot of stuff. you really need to trap her into the corner since everyone falls victim to cody corner games.
oh yeah far s.fierce xx fierce rocks works good as distant anti air at times too. depending on how far she is when she jumps will determine if the rocks will combo. but the nice thing is if they roll when the rocks dont connect, the rock will hit em at the start so its totally safe when that s.fierce hits. hope some of that helps. but overall chun >>>cody