Volcarona

Volcarona is a seemingly cheerful, bubbly pokemon who is the wife of Scizor and ex-wife of Excadrill.

Volcarona had a really tragic past. When she was born, she lived in an unknown forest. However, that all came to an end when the forest was struck by a meteor, killing all that were in there. While she herself was spared, her family and friends were not. While mourning, she realised that it was feeling cold despite being a fire type. She realised that the Debris the meteor kicked up blocked most of the sun's rays from entering earth, thus making it much darker and colder. She didn't want more people to suffer, so she trained to evolve into a Volcarona so that she can provide light and heat to everyone. However, due to her deity-like powers, people feared her and chased her away after the debris was gone. She wandered around without a purpose until reaching Unova. She settled down there and let herself get caught by a trainer. There, she met Excadrill. They bonded over battling, with excadrill removing stealth rocks for Volcarona to sweep. They fell in loved, got engaged and married. However, she was boxed by the trainer for a Tyranitar. Angry at the trainer for separating her from her husband, she escaped the PC and tried to hunt down the trainer, only to learn that he died and that she was likely never gonna meet Excadrill ever again. She went to hide in the Relic Castle to mourn the loss of her loved ones.

A few years passed, and she had made a home in Relic Castle. However, she heard that pokemon were flocking to an island, and she moved there too. She made many new friends there, and played a pivotal role in the Iron Serpent battle by removing his origin crown and discarding it. She even reunited with Excadrill.

Then, disaster struck. Ultra Necrozma stole all the world's light, which didn't concern her as she gave out plenty of light herself. However, excadrill wanted to scout Necrozma's base. He came out alive, but barely. He died in front of her, only being able to hang in there to see if she was OK, then passing on.

She looked for Xerneas in Lental to try to revive Excadrill, and succeeded(more info on the Scizor page) but Excadrill had lost all his memories.

She was inconsolable, but things went from bad to worse. Tyranitar, who had married Excadrill, went to visit her. They had a fight and while she almost took Tyranitar down, she was injured extremely badly. Bleeding out and estimated to die soon, she crawled into the public with what little strength she had left. Luckily, people chipped in and healed her right back up. She was still inconsolable though, as Excadrill had left for Unova instead of trying to save her. However, she was consoled by Scizor, Tyranitar(who had buried the hatchet with her) and Ledian. She was still understandably upset, but realised that Excadrill's true soul had moved on to heaven, knowing that she could handle the Ultra Beasts. With a new found resolve, she pushed onwards. She also developed a crush on Scizor, who she thought was handsome. She also wanted to help his bravado become not just a facade to hide his insecurities. He proposed to her, and she said yes.

Nowadays, she strives to become her cheerful and bubbly self again, aided by her friends.

Quoted from u/QuiverDanceVolcarona on reddit