Basically mandatory 3x in a pipe deck, highly desirable in any Gandalf deck to get Wizard Pipe. Outside of those, there's no shortage of 2 spirit allies, so take your pick. I wouldn't be disappointed to have him on my board, but unless you need the hobbit trait for something (Elevenses,) you'd probably be better served by Arwen Undómiel, Galadriel's Handmaiden or West Road Traveller instead.
Ally. Cost: 2. 2 0 0 2
Response: After Bilbo Baggins enters play, search your deck for a Pipe attachment and add it to your hand. Shuffle your deck.
"Elves may thrive on speech alone, and Dwarves endure great weariness, but I am an old Hobbit, and I miss my meal at noon." The Fellowship of the Ring
The Road Darkens #6. Spirit.