no..
Ugh! There is no baby rosalina!
there is no baby rosalina in Mario kart.
No, there is only the regular Rosalina. The only babies are; Baby Mario Baby Luigi Baby Princess Peach Baby Princess Daisy
No Rosalina doesn't. But the stars are like her kids... kinda
she is 4
Currently, no such character exists.
No! The baby characters are too over used. In my mind, this is a NO.
Nope, sorry!
As far as known, Rosalina does not have a boyfriend. She has never been shown having one in the Mario canon.
Who's Rosalina
rosalina is not a character in ssbb