Billy is a baby character who appears in the short Tin Toy.
He serves as a antagonist as he as shown to ruin toys.
Even though he does not appear in Toy Story 3, his toys do appear at Sunnyside Daycare. This may imply that he has become a lot older and outgrown his toys and donated them to Sunnyside.
Trivia
- In the credits of Tin Toy, Billy only plays himself.