Spike (a.k.a. Gentle Giant Spike, as he is called on the official site, and referred to as by fans) is one of the original five main characters in the Land Before Time films and television series. He is a supporting character in the first film, one of the main protagonists of the second, third, fourth, fifth, sixth, seventh, ninth, thirteenth, and fourteenth films, the deuteragonist of the eighth film, a secondary character in the tenth and twelfth films, and one of the three hidden main antagonists of the eleventh film. He is the strongest member of the team.
Spike is raised by Ducky's family, since his family was lost at the time of his birth, and possibly deceased.
In the original film, he is voiced by the late Joe Ranft, who also voiced by Jacques in Finding Nemo, Wheezy in Toy Story 2, Heimlich in A Bug's Life, and Red in Cars, although he is uncredited. In the sequels, he is voiced by Rob Paulsen. In the sixth film, he is voiced by Jeff Bennett, who also voiced Petrie.
- Spike is sometimes listed in fifth place of the main characters, after Littlefoot, Cera, Ducky and Petrie, but is sometimes listed in third place, after Cera and before Ducky.
- Despite being silent, he is voiced by Rob Paulsen and he also spoke in The Land Before Time IV: Journey through the Mists.
- Despite being voiced by Rob Paulsen although Spike is mostly silent, he can be argued to be voiced by the late Joe Ranft in the original film and he was voiced by Jeff Bennett in the sixth film.
- He has a half hour of screen time in the first film, despite appearing in the poster, making him a supporting protagonist. In the sequels, he appears as one of the main protagonists and has a lot of screen time.