I Just Wanted to Be a Trainer, but I Became the Richest Man

"Say it again?" "A green caterpillar, you want 100,000 from me?" "King Magikarp wants 200,000, why don't you give me a counter-offer?" "Is there any mistake? A Kirby costs 2 million?" "I said if you want to steal money, just say so. There is no need to give it to me with an elf." ... When Qin Yu woke up, he traveled through time and came to this world where humans and elves coexisted. But elves in this world are not found everywhere, but are an extremely rare luxury product. However, Qin Yu, who only wanted to realize his dream of becoming a trainer, was poor. He simply couldn't afford an elf, not even a green caterpillar. Fortunately, at this time, he awakened the Elf God System, and he could just buy everything he wanted. Available for purchase last... Qin Yu discovered that there are too few things about elves in this world. Many things about the elves have not yet been studied in this world. Since there isn't one, you have to make it yourself. Fortunately, this world is rich in raw materials, and with strong financial resources, Qin Yu has developed various black technologies. ... Many years later, while becoming a powerful trainer, Qin Yu also became the top elf doctor and the richest man in the world.