After my vacation, I played on my Platinum version.
Team:
~ Torterra
~ Staraptor
~ Floatzel
~ Medicham
~ Magnezone
~ Drapion
I went through well on my Platinum. Beating Cyrus in the Distorted World was a bit of a problem. Without my Medicham, things really fell apart. I beat Houndoom with a Close Combat from my Staraptor, so Cyrus sent in Weavile. I was confident that I can OHKO and outspeed it with Close Combat, so I let Staraptor stay in, but Weavile OHKO'd it with Ice Punch. The rest of my team got killed but my Torterra and one other Pokemon. Eventually, I sent out Magnezone, and I eventually Discharged it (I did not send it out since I dread Brick Break. Gyarados Earthquaked my Magnezone, so I revived one other Pokemon and eventually killed it off. Honchkrow killed off my yet-revived again Magnezone (GAHHH HEAT WAVE) and Drill Pecked Staraptor until it fainted. Of course, I eventually killed it off. From there, things went better (Crobat was the last Pokemon).
Anyways, I trained my team to level 60 each. I have yet to take on the E4.
@flipz - Basically any non-Bug type Pokemon with wings can fly.
@period -
Fissure - W-w-w-hy would you use that...? It's banned in competitive play, and Earthquake is a better option, since you can at least OHKO some Pokemon...

Rest-Talk - Dugtrio was built for revenge killing, not for walling, considering his paper thin defenses.
Double Team is also banned in competitive play.
A good Dugtrio moveset would be:
-Earthquake
-Stone Edge/Night Slash/Pursuit
-Aerial Ace
-Sucker Punch/Stone Edge
This set only works if it has the Arena Trap ability.