Is this the second best selling game on a family of systems ever?Well, no. GTAV definitely sold massively more than this on PS3+PS4, at the very least double this. More likely triple. And if we forget PC, there's still plenty.
GTAV on PS3+PS4 might be the only thing to sell more.
There's exclusives like Wii Sports, Mario Kart Wii, Super Mario Bros, Wii Sports Resort, Pokemon Red/ Blue, Tetris (GB), New Super Mario Bros DS etc.
Talking PS only I'm sure GTA San Andreas sold more as well. And I'm sure there's some games like COD games which sold more than this on PS too, and certainly on xbox last gen. Plus there's also GTA V on xbox which will have sold way more than this too.