Please rate my ideal PKMN/Moveset for Platinum's "Battle Stage".

[Valdens]

Erm, you're not very well off vs Steel..

and to be honest, Zangoose is a pretty bad choice. A Machamp, Medicham, Hariyama etc. could all OHKO you with ease. Why not pick a more reliable sweeper like Garchomp, Tyranitar, Snorlax, Infernape etc?