Only A Hand-Full of Pokémon of Diamond & Pearl are known at this time, they are in numerical order then in the order that they were revealed:

 #387 Naetoru
US Name: ???
JP Name: Naetoru

National Dex: #387
Sinnoh Dex: #001

Type:

Classification: Young Leaf Pokémon
Height: ?
Weight: ?

Abilities: Overgrow

Known Attacks:

Obtained:
Starter Pokémon

 #390 Hikozaru
US Name: ???
JP Name: Hikozaru

National Dex: #390
Sinnoh Dex: #004

Type:

Classification: Young Monkey Pokémon
Height: ?
Weight: ?

Abilities: Blaze

Known Attacks:

Obtained:
Starter Pokémon

 #393 Pocchama
US Name: ???
JP Name: Pocchama

National Dex: #393
Sinnoh Dex: #007

Type:

Classification: Penguin Pokémon
Height: ?
Weight: ?

Abilities: Torrent

Known Attacks:

Obtained:
Starter Pokémon

 #396 Mukkuru
US Name: ???
JP Name: Mukkuru

National Dex: #396
Sinnoh Dex: #010

Type:/

Classification: Gray Starling Pokémon
Height: 1'00"
Weight: 4.4lbs

Abilities: Keen Eye

Known Attacks:

 #399 Bippa
US Name: ???
JP Name: Bippa

National Dex: #399
Sinnoh Dex: #013

Type:

Classification: RoundMouse Pokémon
Height: ?
Weight: ?

Abilities: Simplicity or Natural

Known Attacks:

 #401 Korobooshi
US Name: ???
JP Name: Korobooshi

National Dex: #401
Sinnoh Dex: #015

Type:

Classification: Grasshopper Pokémon
Height: ?
Weight: ?

Abilities: Shed Skin

Known Attacks:

 #403 Korinku
US Name: ???
JP Name: Korinku

National Dex: #403
Sinnoh Dex: #017

Type:

Classification: Flash Pokémon
Height: ?
Weight: ?

Abilities: Intimidate or Beligerence

Known Attacks:

 #??? Subomi
US Name: ???
JP Name: Subomi

National Dex: #???
Sinnoh Dex: #025

Type:/

Classification: Flower Bud Pokémon
Height: ?
Weight: ?

Abilities: Natural Cure Or Poison Point

Evolution Chain:

--???-->--???-->

Known Attacks:

 #??? Roserade
US Name: ???
JP Name: Roserade

National Dex: #???
Sinnoh Dex: #027

Type:/

Classification: Bouquet Pokémon
Height: ?
Weight: ?

Abilities: Natural Cure Or Poison Point

Evolution Chain:

--???-->--???-->

Known Attacks:

 #??? Pachirisu
US Name: ???
JP Name: Pachirisu

National Dex: #???
Sinnoh Dex: #055

Type:

Classification: Electric Squirrel Pokémon
Height: ?
Weight: ?

Abilities: Run Away Or PickUp

Evolution Chain:

Known Attacks:

 #??? Buizel

US Name: ???
JP Name: Buizel

National Dex: #???
Sinnoh Dex: #056

Type:

Classification: Sea Weasel Pokémon
Height: 2'3" (0.7m)
Weight: 65.0lbs (29.5kg)

Abilities: Swift Swim

Evolution Chain:

Known Attacks:

Known Non-DP Appearences:

 #??? Cherimu
US Name: ???
JP Name: Cherimu

National Dex: #???
Sinnoh Dex: #059

Type:

Classification: Sakura Pokémon
Height: ?
Weight: ?

Abilities: Flower Head

Known Attacks:

 #??? Bonsly

US Name: Bonsly
JP Name: Usohachi

National Dex: #???
Sinnoh Dex: #092

Type:

Classification: Bonsai Pokémon
Height: 1'8" (0.5m)
Weight: 33lbs (15.0kg)

Abilities: Rock Head Or Sturdy

Evolution Chain:

--???-->

Known Attacks:

Notes:
Bonsly is more dominant in Pokémon Pearl

Known Non-DP Appearences:

 #??? Mime Jr

US Name: Mime Jr
JP Name: Manene

National Dex: #???
Sinnoh Dex: #094

Type:

Classification: Mime Pokémon
Height: 2'00" (0.6m)
Weight: 28.6lbs (13.0kg)

Abilities: Filter Or Soundproof

Evolution Chain:

--???-->

Known Attacks:

Notes:
Mime Jr. is more dominant in Pokémon Diamond

Known Non-DP Appearences:

 #??? Perap

US Name: ???
JP Name: Perap

National Dex: #???
Sinnoh Dex: #102

Type: /

Classification: Music Note Pokémon
Height: 1'08" (0.5m)
Weight: 4.0lbs (1.9kg)

Abilities: Keen Eye Or Unstable Gait

Evolution Chain:

??

Known Attacks:

Known Non-DP Appearences:

 #??? Lucario

US Name: Lucario
JP Name: Rukario

National Dex: #???
Sinnoh Dex: #113

Type: /

Classification: Wave-Guiding Pokémon
Height: 4'00" (1.2m)
Weight: 119lbs (54.0kg)

Abilities: Inner Focus Or Humble Heart

Evolution Chain:

Known Attacks:

Known Non-DP Appearences:

 #??? Dorapion
US Name: ???
JP Name: Dorapion

National Dex: #???
Sinnoh Dex: #128

Type: /

Classification: Changeable Skorupion Pokémon
Height: ?
Weight: ?

Abilities: Battle Armor Or Snipe

Known Attacks:

 #??? Munchlax

US Name: Munchlax
JP Name: Gonbe

Type:

Classification: Big Eater Pokémon
Height: 2'00" (0.6m)
Weight: 231 lbs (105.0kg)

Abilities: Pick Up Or Thick Fat

Evolution Chain:

--???-->

Known Attacks:

Known Non-DP Appearences:

 #??? Weavile

US Name: Weavile
JP Name: Manyula

Type: /

Classification: Sharp-Claw Pokémon
Height: 3'8" (1.1m)
Weight: 75lbs (34.0kg)

Abilities: Pressure

Evolution Chain:

--???-->

Known Attacks:

Known Non-DP Appearences:

 #??? Manaphy

US Name: ???
JP Name: Manaphy

Type:

Classification: Voyage Pokémon
Height: 1'00" (0.3m)
Weight: 3.0lbs (1.4kg)

Abilities: Moist Body

Evolution Chain:

Known Attacks:

Known Non-DP Appearences:

 #??? Tamanta

US Name: ???
JP Name: Tamanta

Type: /

Classification: Kite Pokémon
Height: 3'03" (1.0m)
Weight: 143.3lbs (65kg)

Abilities: Swift Swim Or Water Absorb

Evolution Chain:

--???-->

Known Attacks:

Known Non-DP Appearences:

 #??? Dialga
US Name: ???
JP Name: Dialga

Type:/

Classification: Time Ruling Pokémon
Height: ?
Weight: ?

 #??? Palkia
US Name: ???
JP Name: Palkia

Type:/

Classification: Space-Ruling Pokémon
Height: ?
Weight: ?

 #??? Elekible
US Name: ???
JP Name: Elekible

Type:

Classification: Thunder & Lightning Pokémon
Height: ?
Weight: ?

Abilities: Electric Engine

Evolution Chain:

--Lv. 30-->--???-->

Known Attacks:

 #??? ???
US Name: ???
JP Name: ???

Type: ?
Classification: ? Pokémon
Height: ?
Weight: ?

 #??? Pinpuku
US Name: ???
JP Name: Pinpuku

Type:

Classification: Pretend Pokémon
Height: ?
Weight: ?

Abilities: Natural Cure or Serene Grace

Evolution Chain:

--???-->---->

Known Attacks:

 #??? Zugaidosu
US Name: ???
JP Name: Zugaidosu

Type:

Classification: HeadButting Pokémon
Height: ?
Weight: ?

Abilities: Unconventional

Known Attacks:

Notes:
Zugaidosu has to be revived from a Fossil
Zugaidosu is exclusive to Pokémon Diamond

 #??? Tatetopusu
US Name: ???
JP Name: Tatetopusu

Type:/

Classification: Shield Pokémon
Height: ?
Weight: ?

Abilities: Guts

Known Attacks:

Notes:
Tatetopusu has to be revived from a Fossil
Tatetopusu is only in Pokémon Pearl

 #??? Minomucchi
US Name: ???
JP Name: Minomucchi

Type:

Classification: Bagworm Pokémon
Height: ?
Weight: ?

Abilities: Shed Skin

Known Attacks:

 #??? Masukippa
US Name: ???
JP Name: Masukippa

Type:

Classification: FlyCatcher Pokémon
Height: ?
Weight: ?

Abilities: Levitate

Known Attacks: