I sent Boone back to the Lucky 38 a while back and I was going to use him as a companion today, But I couldn't find him when I went into the presidential suite. I thought he may have went to Novac by mistake but he wasn't in his room nor the dinosaur. I was gonna complete his companion quest but now I don't know where he could be. It's too late to reload a game save so that's out of the question.
Try this: - Open the Console via the ~ key. - Type "prid 00096bce" (No quotes) - Press ENTER or RETURN - If all goes alright, you'll see the word "Boone" on the top of the screen. - Type "resurrect 1" (No quotes) - Hit ENTER/RETURN - Type "Moveto player" (No quotes) - Hit ENTER/RETURN - Close the Console by pressing ~ again. --- If everything goes alright, he'll spawn beside you.
That wouldn't have worked since I play New Vegas on Xbox. But it doesn't matter, since I finally found Boone. He was in the lobby to the Lucky 38, hidden behind a securitron, so everything's good now.