Commit of decompiled and "updated" code.

Buffs/Shotgun/Hypercharge.cs

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+using Terraria;
+using Terraria.ModLoader;
+
+namespace FabusMod.Buffs.Shotgun;
+
+public class Hypercharge : ModBuff
+{
+    public override void SetStaticDefaults()
+    {
+        DisplayName.SetDefault("Hypercharge");
+        Description.SetDefault(" - +12% damage for Hellraiser & Golden Shotgun!\n - +12% faster use time for Hellraiser & Golden Shotgun!");
+        Main.debuff[Type] = false;
+        Main.buffNoTimeDisplay[Type] = false;
+    }
+
+    public override void Update(Player player, ref int buffIndex)
+    {
+        if (Utils.NextFloat(Main.rand) < 0.8f)
+        {
+            int dust = Dust.NewDust(player.position, player.width, player.height, ModContent.DustType<Dusts.MoltenWaraxeDust>());
+            Main.dust[dust].scale = 1.8f;
+            Main.dust[dust].velocity.X *= 1f;
+            Main.dust[dust].velocity.Y -= 1f;
+            Main.dust[dust].noGravity = true;
+        }
+    }
+}

Buffs/Shotgun/HyperchargeCooldown.cs

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+using Terraria;
+using Terraria.ModLoader;
+
+namespace FabusMod.Buffs.Shotgun;
+
+public class HyperchargeCooldown : ModBuff
+{
+    public override void SetStaticDefaults()
+    {
+        DisplayName.SetDefault("Hypercharge Cooldown");
+        Description.SetDefault("Unable to Hypercharge!");
+        Main.debuff[Type] = true;
+        Main.buffNoTimeDisplay[Type] = false;
+    }
+
+    public override void Update(Player player, ref int buffIndex)
+    {
+        if (Main.rand.NextBool(3))
+        {
+            int dust = Dust.NewDust(player.position, player.width, player.height, ModContent.DustType<Dusts.CurseDust>());
+            Main.dust[dust].scale = 1f;
+            Dust obj = Main.dust[dust];
+            obj.velocity *= 0.1f;
+            Main.dust[dust].noGravity = true;
+        }
+    }
+}

Buffs/Shotgun/Hypercharging.cs

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+using Terraria;
+using Terraria.ModLoader;
+
+namespace FabusMod.Buffs.Shotgun;
+
+public class Hypercharging : ModBuff
+{
+    public override void SetStaticDefaults()
+    {
+        DisplayName.SetDefault("Hypercharging...");
+        Description.SetDefault("- Charging your weapon!\n - Can't use items!");
+        Main.debuff[Type] = true;
+        Main.buffNoTimeDisplay[Type] = false;
+    }
+
+    public override void Update(Player player, ref int buffIndex)
+    {
+        if (!player.HasBuff(ModContent.BuffType<HyperchargeCooldown>()))
+        {
+            player.noItems = true;
+            int dust = Dust.NewDust(player.position, player.width, player.height, ModContent.DustType<Dusts.SorcerousHellDust2>());
+            Main.dust[dust].scale = 2f;
+            Main.dust[dust].velocity.Y = -1f;
+            Main.dust[dust].velocity.X = 0f;
+            Main.dust[dust].noGravity = true;
+        }
+    }
+}

Buffs/Shotgun/Ultracharge.cs

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+using Terraria;
+using Terraria.ModLoader;
+
+namespace FabusMod.Buffs.Shotgun;
+
+public class Ultracharge : ModBuff
+{
+    public override void SetStaticDefaults()
+    {
+        DisplayName.SetDefault("Ultracharge");
+        Description.SetDefault(" - +12% damage for Color Splasher!\n - +12% faster use time for Color Splasher!");
+        Main.debuff[Type] = false;
+        Main.buffNoTimeDisplay[Type] = false;
+    }
+
+    public override void Update(Player player, ref int buffIndex)
+    {
+        int dust1 = Dust.NewDust(player.position, player.width, player.height, ModContent.DustType<Dusts.RainbowDust>());
+        Main.dust[dust1].scale = 1.8f;
+        Main.dust[dust1].velocity.X *= 1f;
+        Main.dust[dust1].velocity.Y -= 1f;
+        Main.dust[dust1].noGravity = true;
+        int dust2 = Dust.NewDust(player.position, player.width, player.height, ModContent.DustType<Dusts.RainbowDust2>());
+        Main.dust[dust2].scale = 1.8f;
+        Main.dust[dust2].velocity.X *= 1f;
+        Main.dust[dust2].velocity.Y -= 1f;
+        Main.dust[dust2].noGravity = true;
+        int dust3 = Dust.NewDust(player.position, player.width, player.height, ModContent.DustType<Dusts.RainbowDust3>());
+        Main.dust[dust3].scale = 1.8f;
+        Main.dust[dust3].velocity.X *= 1f;
+        Main.dust[dust3].velocity.Y -= 1f;
+        Main.dust[dust3].noGravity = true;
+    }
+}

Buffs/Shotgun/UltrachargeCooldown.cs

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+using Terraria;
+using Terraria.ModLoader;
+
+namespace FabusMod.Buffs.Shotgun;
+
+public class UltrachargeCooldown : ModBuff
+{
+    public override void SetStaticDefaults()
+    {
+        DisplayName.SetDefault("Ultracharge Cooldown");
+        Description.SetDefault("Unable to Ultracharge!");
+        Main.debuff[Type] = true;
+        Main.buffNoTimeDisplay[Type] = false;
+    }
+
+    public override void Update(Player player, ref int buffIndex)
+    {
+        if (Main.rand.NextBool(3))
+        {
+            int dust = Dust.NewDust(player.position, player.width, player.height, ModContent.DustType<Dusts.RainbowCurseDust>());
+            Main.dust[dust].scale = 1f;
+            Dust obj = Main.dust[dust];
+            obj.velocity *= 0.1f;
+            Main.dust[dust].noGravity = true;
+        }
+    }
+}

Buffs/Shotgun/Ultracharging.cs

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+using Terraria;
+using Terraria.ModLoader;
+
+namespace FabusMod.Buffs.Shotgun;
+
+public class Ultracharging : ModBuff
+{
+    public override void SetStaticDefaults()
+    {
+        DisplayName.SetDefault("Ultracharging...");
+        Description.SetDefault("- Charging your weapon!\n - Can't use items!");
+        Main.debuff[Type] = true;
+        Main.buffNoTimeDisplay[Type] = false;
+    }
+
+    public override void Update(Player player, ref int buffIndex)
+    {
+        if (!player.HasBuff(ModContent.BuffType<UltrachargeCooldown>()))
+        {
+            player.noItems = true;
+            int dust = Dust.NewDust(player.position, player.width, player.height, ModContent.DustType<Dusts.SorcerousHellDust2>());
+            Main.dust[dust].scale = 2f;
+            Main.dust[dust].velocity.Y = -2f;
+            Main.dust[dust].velocity.X = 0f;
+            Main.dust[dust].noGravity = true;
+        }
+    }
+}