I try to pokemons

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1st gen - Venusaur (Grass/Poison) - guaranteed(?)
2nd gen - Skarmory (Steel/Flying) - Mountain
3rd gen - Gardevoir (Psychic/Fairy) - Central
4th gen - Pachirisu (Electric) - Costal
5th gen - Golurk (Ground/Ghost) - Costal
6th gen - Greninja (Water/Dark) - guaranteed

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1st gen - Charizard (Fire/Flying) - guaranteed(?)
2nd gen - Granbull (Fairy) - Costal
3rd gen - Aggron (Steel/Rock) - Mountain
4th gen - Gallade (Psychic/Fighting) - Central
5th gen - Golurk (Ground/Ghost) - Costal
6th gen - Greninja (Water/Dark) - guaranteed

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1st gen - Charizard (Fire/Fying) - Guaranteed(?)
2nd gen - Azumarill (Water/Fairy) - Central
3rd gen - Flygon (Ground/Dragon) - Mountain
4th gen - Rotom (Ghost/Electric) - Mountain
5th gen - Scolipede (Bug/Poison) - Central
6th gen - Chesnaught (Grass/Fighting) - guaranteed

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1st gen - Blastoise (Water) - guaranteed(?)
2nd gen - Skarmory (Steel/Flying) - Mountain
3rd gen - Sableye (Ghost/Dark) - central
4th gen - Garchomp (Dragon/Ground) - Mountain
5th gen - Garbodor (Poison) - Mountain
6th gen - Chesnaught (Grass/Fighting) - guaranteed

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1st gen - Raichu (Electric) - central
2nd gen - Azumarill (Water/Fairy) - central
3rd gen - Aggron (Rock/Steel) - Mountain
4th gen - Drapion (Poison/Dark) - Mountain
5th gen - Golurk (Ground/Ghost) - Costal
6th gen - Chesnaught (Grass/Fighting) - guaranteed

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1st gen - Venusaur (Grass/Poison) - guaranteed(?)
2nd gen - Skarmory (Steel/Flying) - Mountain
3rd gen - Manetric (Electric) - Costal (Y EXCLUSIVE)
4th gen - Floatzel (Water) - Mountain
5th gen - Scrafty (Dark/Fighting) - Central
6th gen - Delphox (Fire/Psychic) - Guaranteed