(en) Jon Ledford, « 10 Best Trading Card Games », sur arcadesushi.com (consulté le ) : « Yu-Gi-Oh!, Digimon, and Pokémon may have each declined in popularity over the past decade [...] ».
(en) Brian Camp et Julie Davis, Anime Classics Zettai!: 100 Must-See Japanese Animation Masterpieces, , 408 p. (lire en ligne), p. 103-108.
(en) Takako Aoyama et Tomoko Akashita, Anime Poster Art: Japan's Movie House Masterpieces, Cocoro Books (lire en ligne), p. 76, Digimon quickly established its own international fanbase.
« INTERVIEW: Jeff Nimoy » (consulté le ) : « All the names came from Toei Animation and Bandai Toys. [...] . On a rare occasion, they would ask for suggestions on an English character name. ».
« Bandai consolide ses marques emblématiques et joue la carte des licences à succès issues des plateformes Internet. », La Revue du Jouet, no 555, , p. 39 (lire en ligne [PDF])
(en) « Ten Network Holdings Limited Annual Review 2001 24 : 7 » [PDF], sur Network Ten (consulté le ) : « Cheez TV has become a must-watch for younger viewers who enjoy the team’s unique style and exciting content including Pokemon, Digimon and Dragonball Z ».
(en-US) « Q/R avec l'adaptateur Jeff Nimoy (2006) », sur With the Will (consulté le ) : « All those things came directly from Bandai to match whatever info they were putting out on the trading cards. Why they chose it, I don't know, I just had to stay consistent with them. ».
(en-US) « Q/R avec l'adaptateur Jeff Nimoy (2006) », sur With the Will (consulté le ) : « Toei Animation knew they would eventually incorporate kids from all over the world, so the decision was to leave it Japan, and ignore the fact that they all sound like they're from the midwest. ».