Some TMNT stuff was always meant for grownups.
Komodo comes from a long line of Japanese rulers and is the last surviving member of the House of Komodo, which had been thought exterminated during World War I. His true descent lies in the dragon, a birthright he attempted to embrace by having mercenary cyborgs and Pimiko's kunoichi capture Splinter. Using a synthetic mutagen distilled from Splinter's blood, Komodo intended to use it to mutate himself into a sentient, true dragon. But when the Turtles invaded in search of Splinter, Pimiko's treachery resulted in the self-destruction of Go-Komodo's headquarters. Go-Komodo himself disappeared during the fighting, leaving his half-brother, King Komodo, who had been accidentally injected with the synthetic mutagen, to do the fighting. Following the destruction of his headquarters in upstate New York, Go-Komodo moved himself and his business to Taiwan.
Go-Komodo eventually returned to New York, now an ally of Lady Shredder. He confronts Pimiko and the Turtles, revealing that he is in fact Pimiko's maternal uncle. When Pimiko questioned why Go-Komodo never told her this until now, he states that he's going to kill her, calling her ungrateful like her mother.
He was killed by King Komodo in.