Thats not very impressive considering nintendo has been milking the same 10 characters for over 20 years. Imagine if Sony started making 3-5 Kratos games and spinoffs every generation, what would happen in 20 years? Anyways all of Nintendos characters are kid friendly so they can make tons of toys and other merchandise, so of course more people will know of the characters. Yet this means nothing to the king of video games title, now if it was the king of video games merchandise or king of video game toys or maybe king of reusing IPs, then I would agree. Just did I quick search and since 1981 and there are around 300 video games featuring the character MARIO.
You make an interesting point. From 2008-2013 Sackboy starred in three numbered LittleBigPlanet games, two handheld-tailored play-alikes for PSP and PSV, a racing game (LBP Karting) and the crossover PlayStation All-Stars Battle Royale.
Who is Sackboy?
I am pretty sure most playstation users know who sackboy is, what is your point? 5 years is no where near enough time to become as famous as Mario, Go back to 1981-1986 and ask people who Mario was.