It doesn't really matter on the moves rather you give the best possible cool pokeblocks to your Pokemon i used a breloom that liked Red pokeblocks which hold coolness in each i easily won with it and it had these moves: Sky uppercut, Hyper beam, Dynamicpunch, Solarbeam.
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this may work or not.You have to complete BLAZIKEN's beauty condition and give it high appealing moves.(i'll tell you next time)
aura sphere is really cool i wonder if it would work well in a contest
The three thunders. thunderbolt ,thunderpunch, thundershock.
Well, your question can't be answered unless you're more specific. Different moves apply to the different types of Contests, those being: Tough, Smart, Cool, Beauty, and Cute. For instance, if you want a Pokemon to enter the "Tough" Contest, it is best to teach it moves such as Rollout, Double-Edge, Take-down, and so on. Likewise, moves such as "Charm" or "Attract" will do best in "Cute" Contests. There are many helpful sites on the internet that will give you walkthroughs and FAQ's which should address your other questions. :)
If you win a Master Rank contest, a picture of your winning Pokemon will appear there. Cool contest - red frame, beauty contest - blue frame, and so on.