Spike

Spike is the Pickles family pet. Tommy claims him to be his best "animal" friend. The character is considered a main character in the series, appearing in almost three quarters of all of the episodes, though he usually does not come along when the Rugrats venture to new locations. It is mentioned that his breed is the fictional Siberian Tiger Hound, which is in universe an extremely rare and highly valuable breed of dog worth thousands of dollars. As shown in The Rugrats Movie and Rugrats Go Wild, Spike is very protective of the babies, as he sees them as his "babies"; during Rugrats Go Wild, he is ashamed because he lost his "babies".

Description
Like most family dogs, Spike is a friendly, loyal mutt whose main interests are food and his "wife" Fifi. Stu and Didi consider him a dumb but pleasant member of the family. Yet Spike is often more aware than they are of what the Rugrats are up to. He and Tommy share an intrepid interest in, and curiosity about, the world around them. When he's not rescuing Tommy from impending doom, Spike often takes the babies on magnificent adventures through the neighborhood --- adventures which Stu and Didi are never aware of. - Rugrats Description from Klasky Csupo

Poor Spike! As dogs age seven years for every year a person does, Tommy's faithful pooch is now AT LEAST 70! Quite a bit slower than the spry young pup we knew from the original Rugrats series, Spike spends most of his time eating, sleeping and passing wind these days. Still, Tommy and Dil love him, and often sneak him treats when their parents aren't looking. Though he may not move as fast as he once did, Spike is still devoted to the Pickles family to the end. - All Grown Up! Description from Klasky Csupo

Summary
Spike is Tommy's best "animal" friend. The dog is currently "married" to Fifi, a purple-and-white poodle. He often plays with Tommy and Dil. Spike is usually seen inside or near the Pickles' house. Spike has helped the Rugrats through more adventures than he can count (if he could count, that is). Spike doesn't have any magical powers, and he doesn't seem to do anything all that amazing, but looks can be deceiving. Spike watches over the babies more closely than Stu, Didi, or Lou. He is always willing to get his paws in the action when it comes to adventures.

Looks
Spike is mostly an orange-brown color. He has two gray spots on his body and wears a red collar with a gold round dog tag. In the 2021 CGI series, the name "SPIKE" is clearly visible on the dog tag.

Appearances
Spike appears in most episodes of Rugrats, and is classified as a main protagonist of the series. His first appearance was in "Tommy Pickles and the Great White Thing".

Gallery
You can find the Spike gallery here.

Trivia

 * Spike, along with other animals, does not speak. There have been, however, several occasions where he does speak, such as the episode "In the Dreamtime", in which he was voiced by Michael Bell, and Rugrats Go Wild, where he was voiced by action star Bruce Willis.
 * Spike's collar tag is gold with no symbols or words on it, though a Spike plush toy was manufactured featuring his name on his collar.
 * Spike is one of three of the main Rugrats characters to have the camera viewed from inside his mouth in All Grown Up!. The other two are Angelica and Dil.


 * The relationship between Spike and Tommy appears to be loosely based on the close relationship between Bart Simpson and his dog Santa's Little Helper. Klasky-Csupo, the animation studio which oversaw the creation of Rugrats, previously provided animation work for The Simpsons between 1987 and 1992.
 * One of Spike's puppies, Pepper/Sparky isn't seen or mentioned in All Grown Up!.


 * Spike has been show to care greatly for the babies as seen in Rugrats Go Wild, where he talks about them as being his own.
 * In The Rugrats Movie, Angelica makes up a false story about Spike being once a human named Paul who then transformed into a dog after "being put out in the rain".
 * Despite being one of the main characters in Rugrats he only appears for five episodes of All Grown Up which are Truth or Consequences, Brother, Can You Spare the Time?, It's Cupid, Stupid, The Science Pair and Curse of Reptar.
 * The only incarnation of the franchise where he doesn't appear is Rugrats Pre-School Daze.