|The following is based on Fallout New Vegas cut content and has not been confirmed by canon sources.|
Barnabas bear is not included in the main game as it's only obtainable through the Child at Heart perk, which was ultimately cut for New Vegas, but is accessible via the console. It was intended for use in Bitter Springs. The line "I like you. Will you take Barnabas Bear to New Vegas when you go?" is attached to this item.