>>280166764I presume they might mean a "Big Three 4Kids 2000s Digipaint Anime", which I guess would come down to Sonic X, Kinnikuman Niisei, and Yu-Gi-Oh.
Certainly not the actual, definable big three which marked a significant change in western trends for consumption of anime and manga with a marked rise in the normalization of reading/watching franchises as they released almost day and date in Japan, because that'd be fucking retarded and Sonic X had no involvement within that realm.