as iris, you can:

light Punch:x button

heavy Punch:y button

light kick: a button

heavy kick: b button

hadouken: QCF+HP(or 236+y)

hyaku retsu kick:heavy kick repeatly

as SPIKE, he can:

dhalsim's long punch

E.honda's hip press

Vega(or M.bison in anywhere other than japan)'s psycho crusher

and Zangief's double arm spin(invuln to projectiles)

since SPIKE's skill has ridiculous hitbox and better range, we can exploit AI's flaw.

first just stand back, then guard, wait he use his psycho crusher guard it and do a down+y crouch kick, this will knock he down. then walk to him and when he get up, just do crouch kick again. do this repeatly until he guard your attack, back up and wait for phycho crusher again.

after first round, he will doping and one shot you for one time, just choose first option for twice, and win another round. and you could finish him.

enjoy your easy 120000 credit:)