Video Game Championships

Okay, I'm going for the tournament this year. I didn't know that you could use ubers before I started making my team, but here is what I have so far: (I don't feel like going far into detail here, so you can assume most of the moves they have.)

Start with a scarfed shiftry and an orbed gengar. Explode shiftry, gengar uses substitute. Send out band chomp for next turn. The last pokemon is sub-punch breloom with leech seed and seed bomb.

Which pokemon woud be good for my final two? Thanks for your help.