Once upon a time, when survivors were still trapped in space during their journey in "The Last Baktun", they met another spaceship that had just come in. When the door opened, they saw some troops with advanced armors that don't belong to earth technologies. Some also came with a flashlight torch in one hand, but later the survivors were shocked when the torch was lit up & instead of working as a flashlight, it turned into a laser sword.
Nick: "Holy sh*t, a laser sword...?!"
Ellis: "Wrong, Nick... That's a LIGHT SABER...!!!" *shouted in excitement*
Nick: "Why are you so happy, when we still don't even know their purposes here?"
Coach: "I think I've ever seen them somewhere. I used to see some kids carrying small toys like that when I enjoyed cheese burgers in Whispering Oaks."
Nick: "Oh really? Did your dad buy that toy too?"
Coach: "No. I just ate lots of cheese burgers with my dad instead. Nothing beats cheese burgers..."

Not long afterwards, someone else came down from the spaceship too. This time, it was a man with a black armor covered his whole body & a helm with a black mask that looks like a skull covering his head. The troops that had once been on high alert suddenly calmed down & made ways for him to meet the survivors. Both survivors & that black-armored man shared information to each other, about how his ship entered a wormhole & survivor's explanations about what's currently happening on the earth. The black-armored man soon introduced himself as Darth Vader. Ellis really looked like a kid that can't wait to ask for an autograph with so much excitement, but Coach & other survivors grabbed him tight so he wouldn't act impolitely & put them in danger, as they're facing one of sci-fi legends in space in person.

Then, to beat the bosses in "The Last Baktun", Darth Vader lent survivors their advanced weapons & also upgraded some weapons with laser ammo, as normal guns gave less to no damage to the bosses.