Quote from Marshall in Drumroll, Please
Ted: There was no Victoria at the wedding. Lily: Maybe she used a second fake name. Oh, she's good, she's very good. Marshall: Maybe she was a ghost. That's why she didn't wanna kiss you, because you'd just pass right through her and feel really cold for a second. Oh my God, I just had a great idea for a screenplay. Ted: Marshall. She was not a ghost. Marshall: I know that she wasn't a ghost, she picked up a bouquet, proving she had corporeal form.