If you want to train your bulldog to skateboard it is important that your dog is obedience trained. The dog needs to be good enough in obedience so that he listens to the commands: Sit, Down, Stay, and Come. Specially the ‘Stay’ command is important in this case.
The reason he/she needs to be obedient is because you need to ask yourself how are you able to tell the dog to stay on the skateboard if the dog cannot hold that stay position?

The next important thing is that your dog must be food or treat motivated if not you are going to have a real hard time teaching him/her this trick.
What the trainer recommends is feeding the dog by hand a