Shadowwolflink
Smash Master
I'd say Splatoon has earned its spot as a top Nintendo franchise, and Undertale has been around for almost as long, so I would also consider Undertale a top Indie franchise.I mean... I hate to be that girl but... kind of, yeah
I mean, I haven't actually played Undertale, but I have watched a play through. It definitely seems to have staying power, we're still talking about it 4 years later. It has a pseudo-sequel coming out, Megalovania is a crazy popular meme, merch for the game is everywhere.
It's definitely popular enough for Smash.