What was the title of Fleischer Studios' first full-length film released in 1929?

Fleischer Studios' first full-length film released in 1929 is "Gulliver's Travels." This animated feature was notable for its technical achievements in animation and storytelling during a time when full-length animated films were still a new concept. The film combined a variety of animation techniques and showcased the studio's unique style, which was distinct from other animation houses like Disney.

This film also marked a significant moment in animation history, as it was one of the earliest attempts to produce a feature-length animated film that could compete with live-action cinema. The story followed Jonathan Swift's classic tale of Gulliver and his adventures, and the movie's release helped to establish the viability of animated features in the film industry.

The other choices represent famous animated films from different studios or released at different times. "Snow White," "Fantasia," and "Pinocchio" are all associated with Disney and came out later, thus not relevant to the specific inquiry about Fleischer Studios' inaugural full-length feature.