F Air is usefull against some recovery (Villager) and guard (shulk) and great mind game (multiple hit).
D Air + footstool ; tricky spike tip ; short hop at the edge for edge guarding ; multiple D Air...
U Throw can double KO with good timing with explosion item.
Inhale need to be mastered. With timing (and sometimes short hop) you can swallow Link dash attack and other smash. You have to know what you can do. Sometimes you have to don't release you opponent when you jump off the stage (diagonal or vertical) and sometimes you have to exhale him. You don't have to always kirbyciding ! Most of the time it's just a trick for landing a surprising spike with cutter, footstooling, down air. You need to know how to short hop reverse inhale for surprise.
Hammer is a punishing tool (no damage if you are at high percent) and need great timing. If you let the hammer go with the perfect timing... Against character using guard, bait, you just have to be patient and land it. Using short hop stone for breaking a shield after abusing crouching could be funny.
Final cutter... An other tool for gimp in many ways. On the edge with good spacing ; if you opponent try to edgeguard you and is up to you, and back to the edge if he jump for a spike. many manay ways to land a spike.
Stone is a tricky move very effective against some recovery. If you succeed to land hit on a weak shield, easy ko for you. Usefull baiting tool.
Kirby is a GIMP MACHINE