The "T-800" Zombies are the main antagonists of Zombieland: Double Tap.
Overview[]
The gang comes across a zombie who isn't immediately killed with a double tap, so it has to take more shots until Tallahassee stomps its head in. These harder-to-kill zombies are nicknamed "T-800s". The gang then takes the bus, but their tires get blown out by road spikes. Since Columbus refuses the ice cream truck, they are forced to keep riding the minivan.
The First T-800 zombie was given the Golden Chainsaw in the Kill Count because of how brutal it was, and having a head getting crushed is one of James's favorite kinds of kills.

The First "T-800" Zombie's Death

The gang make it to Graceland but can't stop Little Rock or The Beast. They drive until they see lights at the Hounddog Hotel, an Elvis-themed spot. They find The Beast parked outside. They enter the place and meet Nevada, who draws her gun on the trio until she learns they are harmless. She tells Wichita that Little Rock and Berkeley took off earlier that morning but left The Beast there. Nevada also knows about the slaying of Bill Murray, but isn't aware that it was Columbus's fault. She allows the three to stay there for the night. Tallahassee bonds with Nevada over their shared love of Elvis.
Berkeley continues the drive with Little Rock, as he explains to her that they are going to Babylon, a safe haven for zombie survivors. When they get there, Little Rock is forced to give up her guns since Babylon has a strict no-guns policy, so they melt the weapons down.
The next day, Tallahassee goes outside to find a monster truck driving onto The Beast. Stepping out of the truck are Albuquerque and Flagstaff, who are both essentially doppelgangers of Tallahassee and Columbus. Tallahassee and Albuquerque butt heads while Columbus and Flagstaff compare their sets of rules, or "commandments" in Flagstaff's case. After hanging out for a bit, some T-800 zombies start attacking the monster truck. Albuquerque and Flagstaff head out to kill them and seemingly come back victorious, until they are shown to have been bitten and quickly morph into the same super zombies. Tallahassee smashes Albuquerque's head with a guitar while Nevada finishes off Flagstaff with a head-shot. Tallahassee asks if it was "Zombie Kill of the Year", but Columbus says that honor goes to an Italian man who dropped the Leaning Tower of Pisa onto some zombies.
These 3 T-800 zombies were given the Dull Machete in the Kill Count as they were offscreen.

The 3 T-800 zombies attacking Flagstaff and Albuquerque

The trio prepare to head off to continue their search for Babylon. Tallahassee and Nevada part ways with a kiss. On the way, they find that Madison is still alive and driving the ice cream truck. It turns out she just had an allergic reaction to eating nuts and Columbus shot over her head.
The gang finally arrives at Babylon, where they also have to give up their weapons. They find Little Rock as well. She seems fine staying there and doesn't think her friends would fit there. That night, Tallahassee decides the others should stay in Babylon while he heads off on his own. He bids his friends farewell, but as he drives away, he notices many T-800 zombies heading toward Babylon, as they are attracted by the fireworks that are popping off. He runs back to warn everyone, and he tells them they need to fight back. Since there are absolutely no weapons in the place, Tallahassee comes up with a plan to light the zombies up with bio-diesel fuel and fireworks. The gang lures the zombies with the lights before getting ready to light up the bio fuel tank. It causes a huge explosion, but it's not enough to kill the massive horde of zombies. The main four accept their fate and huddle together, right before Nevada shows up in the nick of time and runs over some zombies with the monster truck. The gang hopes in the truck, but the zombies flip it over and they have to keep running.
Tallahassee puts a second plan into effect by having himself and the group run up to the top of the highest tower in Babylon. The survivors form a path with shields as the zombies chase Tallahassee. He leaps over the edge and grabs onto a hook while the super zombies plummet to their deaths. Two stragglers grab onto Tallahassee's leg, making him almost slip until Little Rock pulls out a pistol and kills them. They pull Tallahassee back to safety. In the aftermath, Wichita decides to accept Columbus's proposal. Tallahassee and Nevada get together while Little Rock breaks up with Berkeley so he can hook up with Madison.