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If you mean underground, you use the explorer kit in the key items. You get the explorer kit by talking to the old man in the house next to the Pokemon center in Oreberge city. After you finsh the pokedex you can get awesome items! :D Hope It Helped!! Fr: Glaceon66 Happy Playing!!!
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Earn +20 ptsQ: How do you get to the underworld Pokemon Platinum?
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How do you get a togepi in Pokemon Platinum?
how to get a togepi in Pokemon platinum
How do you give the grunt a Pokemon in Pokemon Platinum?
There is no grunt that you can give a Pokemon to in Pokemon platinum.
What Pokemon is no 184 in pokedex in Pokemon Platinum?
That pokemon is Azumarill in pokemon platinum in the national pokedex
Can you get a jirachi in Pokemon Platinum?
No, you cannot get Jirachi in Pokemon platinum.
In Pokemon Platinum how do you transfer your Pokemon in Pokemon emerald?
To get your emerald Pokemon to platinum you transfer them in pal park.
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