Exact same toy as the 1999 TOMY Pikachu box set from Japan. Packaging and inserts are in Korean though.
This was officially licensed and released by Young Toys, a famous toy company that still exists today in Korea. Has an official licensing sticker on the back since there were likely many bootlegs circulating at the time.
Box has some signs of aging. The plastic window on the front is coming off a bit on one end.
****Please closely inspect photos before making a purchase. Thanks!****