Why Did the Promised Knight Belt Turn into an Elf?

Chen Bai traveled to the world of Kamen Rider and awakened the system. When I thought the system would give me a knight belt... "Pika Pika!" A yellow-skinned mouse jumped up and down. Unexpectedly, the system actually rewarded me with one: Pikachu. Shouldn't it be a knight's belt? Why did you become an elf? Although I felt a little confused, after accepting the setting. So delicious. … Villain: "Who are you?" Chen Bai: "I'm just a passing Pokémon training master, remember it for me!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.