4th Gen Need help determining the 6th member of my team

[Shayminate]

Ok so I just started on Diamond and here is the team I plan on using in both the game, and on Wifi for a little bit.
Infernape, Alakazam, Golduck, Honchkrow, and Dialga...
Now, I am not looking at a Pokemon that I have to get through trading over Wifi, but one that I can get in game. I have been thinking of a grass or Electric type, but I am not going with Luxray. Roserade has been on my mind, but I am not sure. Anyways, I am open to all suggestions. Thanks!

 

[firekid115]

for electric, you could always try ev training an electivire.

For grass, a really good staller is Tangrowth (it has to be ev'd imo)

 

[bearsfan092]

Dear god, I hope this team never sees the light of Wifi. It would get owned by SD Extremespeed Lucario. You could always go Jolteon, who's generally a good team player who can fight in his own right. E-vire is also good.

I'd get a replacement for Golduck, at any rate.

 

[Gunners]

And you can't use dialga.

 

[LethalTexture]

Don't use your in-game team for Wi-Fi. It will get slaughtered. In-game teams do not need rating because any team works, the game is so easy. If you need more about competitive Wi-Fi battling, read the stickies in the Strategies and Movesets forum. And read the stickies and announcments here while you're at it; under no circumstances should you make posts about in-game teams.

*locks*