Mr.アクリーションJr.

• Moonplanet - If the player also has [ムーンディガー] , a moon that blocks enemy shots orbits the player while held.
• Orrery - if the player has [軌道弾] , it causes the planets fired by Mr. Accretion Jr. to have smaller bullets orbiting them like moons; these bullets persist when the missed shots start orbiting the player. Each planet only has 1 "moon" bullet, regardless of how many moons the corresponding planet has in real life.
• Outer Limits - If the player has [シンギュラリティ] , firing three planets into [シンギュラリティ] 's black hole causes it to explode and deal 100 damage to all enemies in the room.
• Solar Flare - If the player has [フレアガン] , it fires a meteor that pierces enemies and explodes.
• Worlds of Guncraft - If the player also has [ガンダーフューリー] , [ガンダーフューリー] will occasionally shoot out Mr. Accretion Jr. shots.

• Firing or reloading Mr. Accretion Jr. releases a gas with a space texture. This effect is purely visual. If the player attempts to reload when the gun is already full, it will still release this gas.
• This gas is very similar to that released by the time rip that unlocks the Paradox .
• The description is a joke about the fact that the Gungeon is located on the planet Gunymede in an unknown galaxy, so its inhabitants don't know about our solar system.
• The description is also a joke about the Flat Earth Theory, stating that the planets are flat and only appear as if they were spherical. It's also a joke about the game itself, since everything in Enter the Gungeon (like all computer games with 3D graphics) is two-dimensional but exploits perspective to appear three-dimensional.
• " Music of the Spheres " refers to a long-standing ancient mathematical concept which relates the rotation of the heavenly bodies to various mathematical proportions, as well as the pitch of a string to its size. The phrase, and concept, was popularized in philosophy by Pythagoras, and later Plato.
• " Accretion " refers to the process that forms planets out of stellar dust.
• An Orrery is a mechanical model of the Solar System that illustrates the relative positions of the planets and their moons. This name comes from the resemblance the player has when surrounded by orbiting planets, each of which is being orbited by its own bullet-moon.

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