what moves to use ?

Well I think you should read this it has tips about the battle tent , [you must login to view links]

you can use different moves Like Fire Blast:Leaf,Razor Leaf:Water <- it wont be that effective,Blizzard:Flying,then another move idk

The best move to beat the battle tent is, v-create, bolt strike, blizzard, focus blast.
But choose the 3 pokemons with good HP. example: snorlax, alomomola, munchlax, wynaut, amoongus, hippopotas/evolve, tropius, cleffable, wigglytuff, etc. Use focusblast on all pink colored pokemon (my calculation. Hope it works. Example whismur, clefairy, wiggly/jigglypuff) and use v-create for all ice type pokemon, bolt strike for water type. Blizzard for ghost and any other types. Hope it helped u alot..!