Yu-Gi-Oh!
遊☆戯☆王デュエルモンスターズ (original)
The lives of young Yugi Muto and his friends Joey, Tristan and Téa are forever changed when a fantasy card game becomes their reality.
It's a animation and kids show, and has a rating of 8.2 out of 10 from Imdb which is very high for this kind of show.
Watch it here
Not found streaming from Denmark.