[flashback to Lily and Marshall meeting Robin at work:]
Robin: Uh, by the way, how is Ted doing?
Future Ted: [v.o.] Kids, you remember what happened. I declared my love, she turned me down, we both moved out of the apartment, and now...
Robin: I haven't talked to him since we... stopped talking.
Lily: He's pretty good.
[present:]
Ted: Pretty good?
Marshall: Last night, you ate a box of Froot Loops in your tighty whities.
Ted: No, I demolished a box of Froot Loops, fully nude. Yeah, "pretty good" works.