This could refer to how "Neos Wiseman" was a Fusion Monster in the Yu-Gi-Oh! GX anime.
"Kluger" in this card's OCG name is likely based on the German word "Klug", meaning "clever". This is likely a reference to the name of "Neos Wiseman", as well as the OCG names of the upgraded forms of "Yubel", which include German words.