Tournament Legal Cards

After World Championships, only cards from Diamond and Pearl expansion and newer will be legal for play in sanctioned tournaments, with the exclusion of basic energy and reprinted trainer and special energy cards.
Here is a list of some cards that will be legal for play after worlds:

Legal Trainer Cards
Armour Fossil
Dome Fossil
Double Full Heal
Dusk Ball
Claw Fossil
Energy Link
Energy Pickup
Energy Restore
Energy Search
Energy Switch
Great Ball
Helix Fossil
Luxury Ball
Night Maintenance
Night Pokemon Centre
Old Amber
Plus Power
Poke Ball
Poke Blower
Poke Drawer
Poke Healer
Pokedex Handy 910is
Pokeradar
Potion
Premier Ball
Quick Ball
Rare Candy
Root Fossil
Skull Fossil
Super Scoop Up
Switch
Time Space Distortion
Warp Point

Legal Stadium Cards
Conductive Quarry
Dawn Stadium
Lake Boundary
Moonlight Stadium
Snowpoint Temple
Speed Stadium
Stark Mountain

Legal Tool Cards
Amulet Coin
Bubble Coat
Leftovers

Legal Supporter Cards
Bebe's Search
Buck's Training
Cynthia's Feelings
Felicity's Drawing
Fossil Excavator
Marley's Request
Mom's Kindness
Professor Rowan
Rival
Roseanne's Research
Team Galactic's Mars
Team Galactic's Wager

Technical Machines
TS-1 (Evoluter)
TS-2 (Devoluter)

Legal Special Energy Cards
Call Energy
Cyclone Energy
Darkness Energy
Health Energy
Metal Energy
Multi Energy
Rainbow Energy
Recover Energy
Warp Energy