Digimon King

Digimon King (デジモンキング) and Digimon Queen (デジモンクイーン) are terms with varying meanings in the Digimon franchise.

Digimon Tamers
Rika is known as the Digimon Queen.

Digimon Fusion
aims to become the Digimon King, the ruler of the. becomes the ruler of the Digital World after obtaining all 108 Code Crowns, although he calls himself "emperor" rather than "King". After defeats, he becomes the Digimon King.

Go! Go!! Digimon
Digi aims to be the Digimon King, which he achieves after defeating the Coach. Likewise, Mon becomes the Digimon Queen.