Boi Evans is Sharpay's dog. He appears in the second movie. He also makes a short cameo in High School Musical 3. He is portrayed by the pet dog of Kenny Ortega (the director of the HSM series) in HSM 2 and 3 and is portrayed by two other dogs in SFA.
Sharpay takes Boi to the Lava Springs Country Club with her while making the Lava Springs Staff carry her other stuff while she carries Boi. She lets Boi have a tummy rub while she gets a facial.
While Sharpay enters school you could see Boi's picture in a snowglobe she kissed it. He was being held by Tiara Gold when she's singing A Night To Remember (Reprise).
He falls in love with a dog named Countess while Sharpay thinks Boi totally opposes her. Boi and Countess run away together and when Peyton Leverett finds them they lick each other (kiss).