Okay, so the Wii is the first console I've owned in a long time. Today I picked up the original Metroid Prime for $8 to see if I like the style of gameplay before I buy Metroid Prime 3.

When I started the game, I chose progressive scan, but I don't know if the game is supposed to be 16:9 in this mode. Any help? I am very confused.

Metroid Prime offers progressive scan but it's not 16:9.

Most of my GameCube games offer Progressive Scan, but are still in a 4:3 aspect ratio...

According to this site, HDgames.net, the following GC games are 480p/16:9

007: NightFire
Batman Begins
Battalion Wars
Bionicle Mask of Light
Burnout
Burnout 2
Cubivore: Survival of the Fittest
Die Hard: Vendetta
Disney's Extreme Skate Adventure
Eternal Darkness
FIFA 2005
FIFA Soccer 2003
Fifa Street 2
Future Tactics: The Uprising
F-Zero Gx
Geist
Gun
Ice Age 2
James Bond 007: Everything or Nothing
Lego Star Wars II: The Original Trilogy
Madden 2002
Madden NFL 2004
Madden NFL 2005
NASCAR 2005: Chase for the Cup
NASCAR: Dirt to Daytona
NASCAR: Thunder 2003
NBA 2K3
NCAA Football 2003
NCAA Football 2005
Need for Speed Carbon
Need for Speed Underground 2
NFL 2K3
NFL Street
Pokemon Colosseum: Bonus Disc
R: Racing Evolution
Robotech Battlecry
Soul Calibur II
Sphinx and the Cursed Mummy
SSX 3
Star Fox Adventures
Super Mario Strikers
Super Monkey Ball 2
TimeSplitters: Future Perfect
Tom Clancy's Splinter Cell Chaos Theory
Tony Hawk 4
Tony Hawk`s Underground
Tony Hawk's Underground 2
True Crime: Streets of LA
Wallace & Gromit in Project Zoo
Winning Eleven 6 FE

Progressive scan has nothing to do with being 16:9.