At PKMN Black, i used a Masterball to catch Tornadus. And Ultraballs to catch Cobalion, Virizion, and Reshiram.
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At PKMN Heartgold, i used a Quickball to catch Raikou or Entei, and a Masterball to catch Ho-oh.
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Sadly at PKMN Platinum, i got my 1st Masterball and i caught Houndor. =[