Dragon Pulse and Dragonbreath are most certainly not all Sceptile gets with his new typing. Dragon is an extremely valuable type to have, as it brings a plethora of unusually powerful moves a la Draco Meteor, if in fact Sceptile would be able to learn those, as well as new strengths. One of the main drawbacks is the 4x weakness to Ice, but Ice isn't necessarily a commonly used type, so this is a pretty significant gain for Sceptile.