Duck under the first two Alcoon shots, or retreat back a platform to fight them with Power Beam.

Requires:

{"or": [
  "canDodgeWhileShooting",
  {"enemyDamage": {"enemy": "Alcoon", "type": "fireball", "hits": 3}},
  {"enemyKill": {
    "enemies": [["Alcoon", "Alcoon"], ["Alcoon"]],
    "excludedWeapons": ["PowerBeam", "Bombs"]
  }}
]}

Dev note: All the Alcoons are assumed killed in each case.