This is weird, no one posted Kim's KOF 98 infinites yet.
Extra mode only, non-full POW meter, life may not be flashing red: close standing C (1 hit) -> dwn,dwn+B -> qcb,fwd + K (cancel animation of stomp, but Kim can't perform a DM without POW or red lifebar) -> close standing C (1 hit) -> dwn,dwn+B -> qcb,fwd + K -> close standing C (1 hit) -> dwn,dwn+B -> qcb,fwd + K, etc.
Advanced mode only, POW mode (press ABC and use up one stock), corner only, against jumping opponent only: -> jump -> qcf + B -> qcf,uf + B -> qcf,uf + B -> qcf,uf + B -> etc.
This infinite is a variation on what is for my money the most interesting and best-looking combo in KOF 98: in corner, jump, qcf + B, qcb + B (on the ground), qcf,uf,hcb+K (timing is extremely strict for the DM juggle).