HxH : Pokemon Master - Chapter 136: Meloetta?

Bathed in the love of her imperial family and her husband, Yun Shang was a spoiled princess and the envy of many at the Royal Court. Her life had been perfect right up till the moment when she realized that everything was just a sham, a ruse designed by the Empress to ruin Yun Shang. After enduring bitter treachery and being poisoned, Yun Shang died with a broken heart and an unfulfilled vow of vengeance. As if God was answering her final request, Yun Shang found herself reborn like an immortal phoenix. She was eight again, and all her memories from her previous life remained intact. The others, however, did not remember the events leading up to her death. Determined not to repeat her mistakes, Yun Shang planned to rain hellfire onto the treacherous, backstabbing villains for all the heart-wrenching pain they had once inflicted upon her. He was the handsome and smart prince of the Ning, who was revered as a battle-hardened general that knew no match in the world. He had thought he wouldn’t settle for anyone until she showed up. A seemingly innocent young princess and a gorgeous prince. Where would their relationship lead them?

- Description from Novelupdates

Pirate World, Before the Summit War.Sengoku: “In this war, the advantage is ours!”Vice Admiral Tsuru: “Can we really win?”Sengoku: “We will win.”As the Summit War begins, chaos erupts on the battlefield.Above Marineford.Suddenly, Will appears in the sky with his crew, overlooking the entire battlefield.Sengoku: “What exactly are you here for? Are you planning to help Whitebeard?”“Don’t misunderstand.”Will scans the battlefield, his gaze sweeping over the powerful figures present. A hint of excitement lingers in his tone.“I’m only here for one reason—to kill all of you. That’s it.”Sabaody Archipelago.Will watches the Celestial Dragons strutting arrogantly through the streets, their eyes filled with disdain for the world. He can’t help but frown.“These are no ordinary Celestial Dragons… This calls for a heavy punch!”...Without hesitation, he throws a devastating punch, obliterating a Celestial Dragon on the spot, crushing the surrounding Marines and CP agents with overwhelming force.The survivors turn to a trembling communications officer clutching a Den Den Mushi and scream in terror:“Hurry! Notify Marine Headquarters! Call for an Admiral!”

An ordinary (?) grandfather, Choi Chuntaek. In an effort to protect his granddaughter, he started the virtual reality game 'Arkstar.'

Then... he accidentally obtained a legendary class?