MTL - Eight Treasures Trousseau - Chapter 82 gift

A mecha otaku is reincarnated into another world as Ernesti Echevalier (Eru). In this world there exist huge humanoid weapons known as Silhouette Knight. Dreaming of piloting those robots, Eru, with childhood friends, Archid Walter and Adeltrud Walter: together they will aim to become a Knight Runner, pilot of Silhoutte Knight.

Hikaru found himself transported to the Pokémon world, but instead of becoming a Trainer, he was now a craftsman specializing in item creation.In an era where technology flourished and traditional craftsmanship faded, artisans were slowly becoming obsolete.However, Hikaru soon discovered something extraordinary—the items he crafted could grant Pokémon incredible enhancements and unique effects.Ancient Relic Slabs, Transparent Bells, Royal Crowns, Reins of Unity... He gradually became a renowned antique craftsman across multiple regions.Rainbow Wings, Life Orbs, Volcanic Keystone, Eviolite... He also embarked on journeys to collect rare materials, earning a reputation as a mystical traveler.Choice Scarves, Victory Armor, Purity Pendants, Shining Charms, Dream Balls...Even items from the Pokémon Trading Card Game could be crafted through his mysterious abilities. He became known as the Unbelievable Master Craftsman.Along his journey, he encountered companions just as unique and ambitious as himself—An Aegislash who sought to create an ideal kingdom.A Lilligant devoted to the cultivation of Berries.An Armarouge obsessed with the art of forging.A Magearna skilled in mechanical inventions.One day, Hikaru turned to Ash Ketchum, offering him a peculiar item.“Here, Ash. Try this.”He handed him a green die—a tool unlike anything seen before.A new adventure begins.

When she woke up, Lake returned to the classroom of the third year. The classmates were in class with swords and sticks, and the teacher became a female Taoist.
The little fat man in the back seat, how to put two big hammers under his chair.
Rick found this to be a global era!

- Description from Uukanshu (translated)

A young man with an extraordinary mind is off on an exciting adventure when he mysteriously wakes up in the body of a feeble slave-guy in a different, rich in quirks world.

The main character, a selfish jerk, would use extreme means to achieve his goals. However, he never allows his base instincts to overrule his sense of decency. He always pays back both good and bad deeds.

Will his (terrible/excellent) mentality help him make a fresh start? Will he get through misfortunes and hardships of the new world?