The reason it seems weird is because my Mudkip's name isn't Poseidon, and its nature is Relaxed instead of Brave, so you may need to redo your damage calculation. XD
Other than that, it's A-O-good. And Pokemon Colosseum music FTW.
All right, Vladdy, let's heat things up with Scald, aka Boiling Water! Let's see if we can cripple Nidhogg with a burn. Follow it up with a Mud-Slap to create more accuracy issues. Finish the round with Avalanche!
If it tries Thunder, retaliate with Mirror Coat!
Scald/Boiling Water (2 names for the same attack)~Mud-Slap~Avalanche
Change any of these to Mirror Coat if Thunder is used.