Anyway, here's my final team after defeating Ghetsis and saving Unova:
Light (Lv. 51)
Light was quick to recognize me as a hero to defeat N and Ghetsis. All it took was one Quick Ball for it to join my side. Despite it's legendary power, Light only defeated Zekrom and Cofagrigus, though its power was not wasted. A Zen Headbutt crit from Zekrom put Light into critical condition for the rest of the fight. The latter...well, Tension saved me in the end for this one.
Tension (Lv. 55)
@ Rocky Helmet
Ability: Cursed Body
I had to replace Neutron the Klingklang after losing it to the final Elite 4 battle with Shauntal, right when I was about to make it through them all without any losses. Caught in Driftveil City when I went backtracking with Surf, Tension was a real life-saver. While he didn't get much action against N, against Ghetsis, he killed off everything that Light didn't, which is everything bar Cofagrigus. It didn't go without losses, and I lost half of my team to Ghetsis (or would it be two? I'll explain in the deaths
section later). Seriously, Will-o-Wisp crippled everything Ghetsis sent out, since they were mostly physical attackers. Cursed Body would disable their most threatening moves on Tension, and turned Hydreigon into a sitting duck (or would it be sitting Dragon?) as it disabled Dragon Pulse right away. This forced him to use Surf or Fire Blast, which were nothing as I Recovered off all damage. This strategy worked on his entire team, and Ghetsis went down as I saved all of Unova. Seriously, burn damage+Rock Helmet+Recover wrecked Ghetsis so hard. Surf and Shadow Ball were hardly needed. But there's one more who managed to live through it all.
Erosion (Lv. 54)
@ Quick Claw
Erosion was caught way back in Mistralton Cave, when I backtracked with Surf again. As slow as he was, having instant Adamant nature Gigalith helped a lot as I made my way through the last stretch of the game. Back when he knew Stealth Rock, I used it to beat Brycen, who still managed to hax me almost to a loss, actually killing one of my team. He's been through a lot of my late-game woes, and despite getting no action against Ghetsis, he made short work of N's Archeops, thankfully for me. Sadly, those are all of my survivors from the final battle, though there's one more who was boxed for the final battle to make room for Light.
Drago (Lv. 51)
@ Rocky Helmet (during E4 battles)
Ability: Rough Skin
So, after I lost Sophia the Gothorita against Brycen, Drago joined the team at Dragonspiral Tower. Right away, he had a good moveset which proved useful for the Elite 4. Return was filler, but Aerial Ace managed to take out a fair number of E4 Pokemon with help of Rough Skin and Rocky Helmet. Honestly, I wouldn't have done so well in the Elite 4 without him, and he gave Kusa the Serperior an opening for Coil+Leech Seed set-up to sweep Marshal. I'm sorry I had to box him for the final battles, but I'm glad he didn't have to see his allies fall against Ghetsis. A very valuable ally for sure.
Ingu (Lv. 24 - 32)
My first death. I couldn't believe I lost her, after doing so well. I caught her in Chargestone Cave, naturally. She was just done catching up with my team when I reached the Rotation Battle on Route 7. I thought she was ready, but then Watchog came around when I expected Swoobat, and OHKO'ed Ingu without a crit. I didn't expect it to be able to kill her in one full shot. Still, I shouldn't have let her battle so soon. Right before Skyla, too...
Raiki (Lv. 29 - 32)
As if it wasn't bad enough that I lost Ingu there, my Route 7 catch didn't last much longer. Raiki instantly came in to avenge the death of Ingu, her fellow Electric type, so I decided to add her to the team. After a small bit of training to catch her up, I made my way to Celestial Tower. There, I ran into a battle with a Psychic, who used a Solosis. I have no idea how this could happen, but a Psyshock instantly killed her too, even after minimal damage. Losing Raiki so soon after Ingu was awful. She shouldn't have gone like that, not in Celestial Tower, right next to her home.
Sophia (Lv. 20 - 39)
My next death was also one of my female teammates. This one hurt a lot because she had been with me since Route 16, right before Elesa. In the battle with Brycen, I brought Erosion, Sophia and Timpani the Seismitoad to battle. A crit from Vanillish's Mirror Shot on the first turn rendered Erosion unable to safely battle after setting Stealth Rock up. I then sent out Sophia, who was holding the Eviolite, so she had great bulk. Vanillish went down easily, but then Beartic came in. After a Psychic and Stealth Rock damage, a crit Icicle Crash killed Sophia. I had no time to sit and worry, because I could have lost both Timpani and Erosion there as well. After a very close fight, I went to go put Sophia to rest. And she was so close to evolving too...
Patrick (Lv. 3 - 42)
Despite the very fitting name for a Lax Patrat, Patrick was one of my strongest teammates. He absolutely crushed Lenora, nearly died to Burgh's Leavanny (with 1 HP left), and helped me through countless battles throughout my adventure. Then, in Drayden's gym, tragedy struck. The many Fraxure already terrified me enough with Rivalry and Dragon Dance boosts, and my worst fears were realized when one got the chance to attack. Despite my attempts to confuse it and put it to sleep, Fraxure killed off Patrick with a Dragon Claw. This loss was awful. I caught Patrick back on Route 1, and so close to the end, I didn't want it to be true. I beat Drayden shortly after, in honor of Patrick. I wish I could write more for the death of my first capture, but that's all that needs to be said.
Timpani (Lv. 15 - 46)
I caught Timpani way back in Pinwheel Forest, right before Lenora. After Patrick died, he the only that Kusa the Serperior had from early on in my adventure. After grinding up my team a bit and getting Neutron onto the team, I made my way through Victory Road. I was hoping to get through safely, but a Conkeldurr had second thoughts. Against all odds, Dynamicpunch hit and killed Timpani as I was hoping to Drain Punch for some health back. I felt terrible, because I shouldn't have kept him in at -6 Speed that Scrafty right before had done. It was too sudden, but I made it to the end of Victory Road without further losses. Timpani was put to rest as prepared for the Pokemon League and Team Plasma.
Neutron (Lv. 29 - 50)
Neutron joined the team after Patrick's death, having been caught at the P2 Laboratory. After level grinding a replacement for Timpani, I made my way through the Elite 4. Each battle got progressively harder, Marshal being the least threatening to my team. After I beat Caitlin, I felt relieved. She was always the most difficult to me, and she had all my team in dangerously low health. When I thought it couldn't get worse, Shauntal sent out her Chandelure in my final Elite 4 battle. I hoped Erosion could take a Fire Blast better, but losing nearly half of his health without a crit meant that Shadow Ball would most definitely kill him unless Quick Claw activated. I switched to Drago, who could take two hits of Shadow Ball. However, Crunch from Drago wasn't quite enough to take him down. I hoped for the best and took out Neutron hoping that Shadow Ball would come next on Drago, since I could outspeed and KO with Thunderbolt afterwards. Unfortunately, as I sent Neutron in, Chandelure had decided to use Fire Blast, bringing an end to Neutron. I almost lost Erosion as I stupidly sent him out, but looks like Neutron was with me as Quick Claw activated and let Erosion get revenge on Chandelure.
Kusa (Lv. 5 - 55)
Kusa, my starter. My Platinum Nuzlocke went through without the loss of my starter, but here, I lost Kusa. This one is weird. I actually lost Kusa against N's Carracosta, who crit with Stone Edge as I was trying to set up with Coil. I couldn't believe I lost my starter, my first Pokemon. Hope avenged him quickly, but I couldn't get past it. Then I remembered that N heals your team afterwards, so I wondered what I'd do about that situation. During the battle with Ghetsis, I decided that I'd use Kusa anyway, but Bouffalant rejected my decision, and as I switched in Kusa expecting an Earthquake, Bouffalant crit killed Kusa with Head Charge before he could do a thing. So even after I tried to give him a second chance, Kusa died as if it didn't even happen. So no matter what, I lost my starter, the one who was with me through everything. If nothing else, I'm glad he fought to the end, and that his death, along with the rest, was not in vain.
Shade (Lv. 26 - 54)
Caught in Celestial Tower to replace Raiki, Shade was a valuable member of my team for the rest of the game. After enduring much time as a little Litwick, he jumped straight to the status of Chandelure. Despite his great help, he was the second to fall to Ghetsis. I had begun well against Bouffalant, burning it with Will-o-Wisp. I tried to boost my speed with Flame Charge as Earthquake did little damage. However, Ghetsis decided to heal Bouffalant, which was the first problem. When I went to burn him again, Will-o-Wisp missed, and Earthquake killed Shade as well. Losing two Pokemon to the same one really got me worried, but Tension managed to save me here, finishing the job Shade started. It was still a terrible loss for the team.
Hope (Lv. 31 - 54)
Despite what some may be thinking, this has nothing to do with the FF13 character named Hope (I actually kinda like the kid). Caught in Icirrus City, I named him Hope as a last resort, but after Timpani's death, I had no other Pokemon that could fill Timpani's spot well. And believe it or not, Hope managed to kill Bisharp, Liepard, Cofagrigus and Sigilyph, one fourth of the entire Elite 4. He lived up to his name very well, killing even N's Carracosta. However, he was the third to fall against Ghetsis. I was hesitant to keep Tension in against Bisharp after he killed of Bouffalant with ease. Hope was bringing him down with Mud Bomb, and had enough bulk to take one more Night Slash before taking Bisharp out. Then despite his Brightpowder, Night Slash crit and killed Hope. At this point, Ghetsis probably thought I was losing hope, but Tension came in and crushed Bisharp, Eelektross, Hydreigon and Seismitoad as well, all in that order. Hope definitely lived on in Tension, and while I managed to save Unova, having lost Hope made for a horridly bittersweet victory.