Here's one tip: unless the pokemon has a perfect nature and poffin setup, it's near impossible to win a Master Rank. I am serious.
*Ahem* My Milotic won both cute AND smart, yet has ZERO conditioning in either. All of her points in visual came from Accessories
Alright, what Pokemon are you trying to use? Certain attacks complement each other, so I may be able to give you some recommendations as to what to use
As for the rest:
Visual: It IS possible to win without using a single poffin, but it is difficult. No matter what, though, Sharp and Created are your best bets. Do NOT take on a contest with Johanna without proper preparation. She is fatal in contests. Also, try to get Sharp if going up against Jasmine or Bryant, and Created if going up against Fantina, Marissa, or Elias. Make sure to get scarfs. I'm not entirely sure how they affect contests, but Elias only became a threat to me in contests when I accidentally went into a Tough Contest Master with a Red Scarf on, so *shrugs*.
With Sharp, try these items:
ANY feathers
Narrow, Wide, Blue, and Purple Scales
Silk Veil and Professors Hat
With Created:
ANY Accessories won from a contest
Flag, Old Umbrella, and Coloured Parasol
Candy, Retro Pipe, etc.
In fact, anything man made will do, including coins
If you aren't certain about a created item, then think this:
Would I be able to find this in a store IRL?
If not, then do NOT use it
Dancing:
All I can say is: Practice. Here is a little tip though. Say that | | | | | is the bar that the Jigglypuff dances across. If a move lands like this: (|), then wait until the Jigglypuff JUST lands on the line before pressing the button. If a move lands like this: |O|, then wait until Jigglypuff is at the PEAK of its jump to press the button
This is the hardest part of the contest IMHO, and the only way you will get good enough is through practice
Appeal:
This depends on the Pokemon you're using. In my case, I ALWAYS lose (save for Beauty due to the conditioning required for a Feebas to evolve) if I vary from this strategy (Well, I DID use Recover to win Smart, but only because a Judge's voltage was at 4, so it did the same thing as Ice Beam PLUS gave me the added bonus of 8 extra points):
Psych Up, Ice Beam, Psych Up, Ice Beam
However, this is VERY conditional, and Pinky (who belongs to Casey) and Loony (belongs to Fantina) happen to be experts at wrecking this strategy (it requires you to get the lowest score so that you can go first and use Ice Beam, getting 2 points + 3 more for going first + 4 more due to Psych Up), so carry another conditional attack (such as Recover ^^) and a non conditional attack that always gives you three points as back up. The non conditional move can NEVER be screwed up by opponents or your order, at the cost of a point. Hey, better to get 3 points than 2, right?
Anyways, as for picking a Judge, I try to go Dexter Jordan Dexter Dexter, and that usually works, but some opponents have a nasty habit of ALWAYS choosing the same judge as you, so be wary and if you notice that a certain opponent keeps on doing this, then try switching it up, as it seems to be that they are programmed with specific appeals, and, as such, will always follow one of several set patterns
One last note: Alright, I admit it, Alxprit is right. Without a high conditioning, these contests are nigh on impossible to win. Heck, it took me MONTHS to win Cute Ribbon Master, as I needed the opponents to be right and the theme to also be right. And when they were, I would inexplicably do bad on the dancing part (...The Jigglypuff was once right on the line, and it counted as a miss, when I have gotten goods with less accurate hits x.x), and even if I managed to do well THEN, well, the opponents LOVED to screw with me in the appeal stage (...BTW, do NOT underestimate Nancy and Boo. They may only get 5 points in the visual stage if you have sharp or created as a theme, and they may do average on the dance, but that is what makes them a Lethal Joke Character. They actually beat me, with me going, "...Huh?". x.x If that Gastly wasn't already dead...)