I'll assume you're talking about the animes, because the Digimon games did literally nothing of note at any point in history.
I never really got into Digimon as a kid, and it's most definitley a ripoff of Pokemon anyways (Digivolve? Really?)
Even though Ash is terrible, there were lots of great side characters. Brock and Misty to start with, characters like Dawn and May later on, and even tons of awesome one-offs.
And to finish this off?
Which show is still going strong at Season 20?
Sure as hell ain't Digimon.