Considering how bad bowser is, this guide is very accurate. To spice it up, how about add some of these fun facts:
1. In the American version of ssbm, Bowser does no damage to Puff and G&W when he Dthrows them.
2. Even if this is targeted for beginners, you might want to mention that if you press Up and B while shielding, you're opponent will regret attacking your shield.
3. Bowser is special in that if he grabs the opponent and keeps hitting them until the opponent mashes out, the opponent will be stuck for a lot longer than if anyone else had grab released them. But the sad thing is that Bowser is so slow that he can't really take advantage of that.
4. Since Bowser is so bad, you should just say that Bowser should try to wait for his opponent to mess up so that he can hit them really hard.