  We present here the current status of pulsar simulations for the Large Area
Telescope, the main instrument on the GLAST mission. We present
"PulsarSpectrum", a pulsar simulator that can reproduce with high detail
gamma-ray emission from pulsars. "PulsarSpectrum" takes into account advanced
timing effects, e.g. period changes with time, barycentering effects and
glitches. Other ancillary tools have been built to provide the simulator with a
realistic population of pulsars and their ephemerides. All these tools are
currently used in the GLAST collaboration for testing the LAT Science Analysis
Tools and for studying LAT capabilities for pulsar science. They have been used
also for generating a simulated pulsar population for the "Data Challenge 2
(DC2)", one of the most important milestones in the development of the GLAST
software. During the DC2, scientists analyzed a set of 55 days of simulated
data in order to validate LAT MonteCarlo, study instrument response functions,
exercise analysis tools and study LAT capabilities. This contribution also
contains results of some analysis performed during DC2 on EGRET pulsars.
