Mega Douser

 is a gun that fires a stream of water with strong knockback. The stream leaves water on the ground wherever it travels.

Trivia

 * This synergy used to only spread Napalm Strike's fire. It was altered to spread all fire.
 * If the player has Dart Gun, damage is increased by 25%. Likely removed because it includes a starting weapon.
 * The name and appearance of the gun reference Super Soaker, a brand of toy water guns.
 * More specifically, its shape and color scheme are based on the original Super Soaker 50.
 * The synergy is a reference to the Pokémon move of the same name. This is likely due to Escape Rope also being a reference to an item in the Pokémon series.
 * If the Mega Douser is fired at a pool of green fire with the synergy, the fire spread will be of the normal variety.
 * If both the synergy and the  synergy are active at once, the ice spread by the Mega Douser will still spread fire.
 * This includes the fire effect caused when reloading Fossilized Gun.