メガウォーターガン

• Get Equipped With -B- - If the player has [ロックハンド] , enables Bubble Lead mode on [ロックハンド] , which fires [バブルブラスター] shots while uncharged. Modes can be switched by reloading the [ロックハンド] with a full magazine.
• Hydro Pump - If the player also has [脱出用ロープ] , damage is increased by 50%, shot speed and knockback is tripled, and stream size is increased.
• Ice Water - If the player has [スノウボーラー] , Mega Douser freezes enemies, leaves ice, and both guns deal 30% more damage.
• Napalm B - If the player has [ナパームストライク] , Mega Douser will spread fire instead of dousing it. With this synergy, the water pool will be flammable like oil, but will be crisscrossed by lines of dry floor that prevent the fire from spreading too far. Spraying the same area will rearrange the dry lines, spreading the fire further.
• When paired with weapons such as [ショックライフル] it can create huge pools of electrified water and damage most enemies in a room. This technique is effective against bosses as well. [バッテリー弾] will immediately electrify the pool, making it an extremely powerful gun for The Robot .
• The Mega Douser's beam won't automatically electrify the pool it creates with [バッテリー弾] .
• Can be used to put out the fireplace as well as the fuse on Chests .
• [バウンド弾] can cause the stream of water to fragment and bounce, covering nearly the whole room in overlapping streams of water.
• If the Hydro Pump synergy is active, Roll Bombs will have their size increased as well while Mega Douser is held.
• if the Hydro Pump synergy is active in Co-op mode, and when one player has the escape rope and the other has the Mega Douser, the bullets the player fires will be increased in size.
• If the player has the Hydro Pump synergy and dodge rolls with the [ネコキングブレットの玉座] , the bullets fired by the throne will also be doubled in size. This only happens when the Mega Douser is held.

• Altered: Napalm B - This synergy used to only spread [ナパームストライク] 's fire. It was altered to spread all fire.
• Removed: - If the player has [ダーツガン] , 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 Hydro Pump synergy is a reference to the Pokémon move of the same name. This is likely due to [脱出用ロープ] 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 Napalm B synergy, the fire spread will be of the normal variety.
• If both the Napalm B synergy and the Ice Water synergy are active at once, the ice spread by the Mega Douser will still spread fire. This includes the fire effect caused when reloading [化石ガン] .

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