How do you get a lombre in platinum?

You will require a Nintendo DS or DS Lite.DSi does not qualify.You also will need Pokémon Sapphire Version.In order to catch LOMBRE,you need to insert your Pokémon Sapphire Version Cartridge in the DS GBA Slot.Have Pokémon Platinum Version in the DS Card Slot.Turn on Platinum.Having certain games(Pokémon Ruby Version,Pokémon Sapphire Version,Pokémon Emerald Version,Pokémon FireRed Version,Pokémon LeafGreen Version)in the GBA Slot,certain POKéMON appear.LOMBRE can be found either at Rt. 210(South) or Rt. 229.You can also use those certain GBA POKéMON games for Migrating.You will need the NATIONAL POKéDEX to add LOMBRES information to it.(The NATIONAL POKéDEX is obtained by seeing all 210 POKéMON for the SINNOH POKéDEX)The NATIONAL POKéDEX is needed to enter Pal Park and Migrate POKéMON from the 5 particular games.Hope I helped!^_^