Pokémon stands above all of its contemporaries and imitators over the years and has become one of the biggest franchises in the world. Digimon also has decent popularity, but could never usurp Pokémon as the best "mon" series. There were many factors in Pokémon's success, some of which are ideas that Digimon could have done better, but never explored.
Source：https://www.cbr.com/10-reasons-pokemon-is-more-popular-than-digimon/
