POKEMON DIAMOND UNLOCKABLES
Bonsly
To get Bonsly you must trade it from Pokemon Pearl.
Caterpie
Have the Game Boy Advance game Pokemon Leaf Green in the cartridge slot and search for Caterpie.
Elekid
Have the Game Boy Advance game Pokemon Fire Red in the cartridge slot and search for Elekid in the Power Plant.
Gligar
Have the Game Boy Advance game Pokemon Emerald in the cartridge slot and search for Gligar
Lotad
Have the Game Boy Advance game Pokemon Sapphire in the cartridge slot and search for Lotad.
Magby
Have the Game Boy Advance game Pokemon Leaf Green in the cartridge slot and search for Magby in Hard Mountain.
Manafi
To get Manfi you must download it from Pokemon Ranger.
Solrock
Have the Game Boy Advance game Pokemon Ruby in the cartridge slot and search for Solrock.
Weedle
Have the Game Boy Advance game Pokemon Fire Red in the cartridge slot and search for Weedle.
National Dex
After defeating the Elite Four you will get the National Dex from Professor Oak. Alternately, see all 151 Pokemon listed in the National Dex. They do not have to be captured.