Trigger

{{Character_infobox|image= |name = Trigger|books = Monster Blood, Monster Blood II, Monster Blood III, Monster Blood IV|television = Monster Blood, More Monster Blood|age = Unknown|hair color = Brown|eye color = Unknown|other names = |species = Cocker spaniel / Collie mix|gender = Male|status = Live|family = Evan Ross (owner)|allies = Andy, Conan Barber, Kermit Majors|likes = |dislikes = Monster Blood}Trigger is the Evan Ross dog in the Monster Blood  book and their successors.

Monster Blood
When Evan Ross stays for a few days at his aunt Kathryn's, Trigger travels with him.

After meeting Andy, she and Evan find the Monster Blood in a toy store. Trigger eats a little of that and begins to grow in size causing chaos. Later, after defeating the Monster Blood, Trigger returns to its normal size.

Finally, he return to home with Evan.

Monster Blood II
In this book not much is known about Trigger, only that appears in the dream of Evan eating more Monster Blood and increasing again of size only to attack Evan.

Monster Blood III
In this book, Trigger does not have much protagonism. He only appears at the end of the story with little Evan climbing over him to ask for help from his father.

Monster Blood IV
Trigger returns in Monster Blood IV, accompanying Evan back to Kermit's house.

Characteristics
Trigger's appearance in the television episode is completely different than how he was described in the book.
 * He is a cocker spaniel.
 * He has lived his entire life with Evan.

Books

 * Goosebumps
 * Monster Blood
 * Monster Blood II
 * Monster Blood III
 * Monster Blood IV
 * Classic Goosebumps
 * Monster Blood

Television and Film

 * Television series:
 * Season 2 - Monster Blood
 * Season 2 - More Monster Blood