All beam weapons that can take out a Sidehopper in 5 hits or less can reliably take out the Sidehoppers damage-free.

Requires:

{
  "enemyKill": {
    "enemies": [
      [
        "Sidehopper"
      ],
      [
        "Sidehopper"
      ]
    ],
    "explicitWeapons": [
      "Super",
      "PowerBomb",
      "ScrewAttack",
      "Plasma",
      "Wave+Spazer"
    ]
  }
}

Clears obstacles: A