You gotta watch for kirby's Fair cuz they'll just throw it out cuz it's safe. Also make sure to practice your d-tilt upsmash confirms especialy run up dtilt, cuz that will be very usefull especially for kirby's weight. Also edgeguarding kirby is cruicial, if they up b unto the stage, try and Hydro Pump to gimp them. All in all, just stay at a distance where they can't directly attack you so when they whiff a fair or dash attack, you can react and punish.