|This article is about a/an episode in Denji Sentai Megaranger.|
We Won't Lose! The Decisive Battle is on Christmas Eve (負けない! 決戦はクリスマスイブ Makenai! Kessen wa Kurisumasu Ibu) is the forty-third episode of Denji Sentai Megaranger. This is the concluding episode of the Neziranger arc, featuring the death of NeziRed, NeziBlack and NeziYellow and the final appearance of Evil Electro-King Javious I and the destruction of Neziregia.
The Megaranger track down the stolen Mega Voyager, leading to a climactic showdown with the Nejiranger... and unknowingly advancing Hinelar's ultimate desire!
When the Megaranger went to rescue Mega Voyager in a forest, they were confronted by the remaining three Nejiranger. Neji Yellow infected Mega Voyager’s system, turning it against the other INET mecha. Mega Winger and Delta Mega were then captured.
Neji Red retreated so he could speak to Dr. Hinelar. He wanted immortality in exchange for destroying the Megaranger. The scientist instead stripped Neji Red of his free will, and his only goal was to kill the Megaranger.
Back at the battle, Neji Red pulled Mega Red out of Mega Voyager. He nearly bested his Mega counterpart until Galaxy Mega arrived and distracted Neji Red. Mega Red entered Galaxy Mega’s cockpit, and he tried to regain control of Mega Voyager.
Neji Phantom, consumed with the desire to eliminate the Megaranger, accidentally forced Neji Yellow out of Mega Voyager. Like Hinelar did to him, Neji Phantom removed Neji Vulgar and Neji Sophia’s free will, and all three monsters combined their powers into a single blast.
Javious, whose life force was nearly depleted by the Nejiranger, melded with the three Neji beasts. Super Galaxy Mega and Mega Winger lent their energy to Mega Voyager, and the Nejiranger were finally defeated by Mega Spartan. Subsequently, Javious was killed in the process.
As the Megaranger celebrated on Christmas Eve, Dr. Hinelar basked in the success of his plan to get rid of Javious.
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- This episode is notable not only for the death of the remaining Nezirangers (NeziRed, NeziBlack, NeziYellow) but, with their death, the death of Evil Electro-King Javious I and the destruction of the Nezire Dimension.
- With Javious' death, all of the remaining Neziregia forces are completely owned and under the control of Dr. Hinelar, while the Death Neziros takes up residence on Earth for the remainder of the series.
- Final appearance of Super Galaxy Mega.
Denji Sentai Megaranger Volume 5 features episodes 42-51. 
- The Enemy Within - Power Rangers counterpart in Power Rangers In Space. See comparison page.
- Andros and the Stowaway - Power Rangers counterpart in Power Rangers In Space. See comparison page.