Energon uses the same skill as Origin Zombie, albeit summoning Robots instead. He has 5,000 health.
| Bosses/Minibosses | ||
|---|---|---|
| Chapter 1: The Simple | Lord Of The Shadows • Reflectar • Origin Zombie • Energon • Noob King • Frezaar | |
| Chapter 2: Invade the Fortress | Defender • Heavy Knight • McSlash | |
| Chapter 3: Dark Illusions | Chartreuse • GrimGold • Azuran • Azurewrath | |
| Chapter 4: Meet your Master | Stone • Aqua | |
| Chapter 5: Technological Terror | Static • TecDev | |
| Chapter 6: The Test | Arcane Warlock • Dezadon | |
| Chapter 7: The Final Test | Baller • Piercer • Slicer • Crusher | |
| Non-Canon chapters/events | Nostalgia Revived 1: War of Souls | Soul Weegee • Soul Turdulator |
| True Nostalgia Revived 1: War of Souls | Soulless Noob King • Nae Jeon-won Bupae • Soulless Weegee • Soulless Turdulator • Soul SazErenos | |
| Nostalgia Revived 2: Noob Defender | Stamper Noob • Giant Armour Noob • Epic Noobs • Mr. Hammer • Sir Noobalot • Newbiemancer • Sir Kadee | |
| Christmas Wrath | Christmas FOE • MerryWrath | |
| Nature Wrath | Spring FOE • SpringWrath | |
| Terror Wrath | Hallo Spear • Hallo Knight • Hallo FOE • HalloWrath | |
| Draco Arcade LVL1 | Armoured Glitchster • Lord of The Board | |
| Drace Arcade LVL2 | Armoured Knight • Glitch Periastron • DeathWrath | |
| Drace Arcade LVL3 | ??? | |