The content below is unlockable in the game. You must use credits earned in the game (of all four varieties) to unlock anything. Listed next to each piece of unlockable content is the number of each credits you’ll need to unlock said content. B = Blue Credits, F = Friend Credits, G = Gold Credits, and R = Red Credits.

• Creatures (I) - 1B/0F/1G/3R
• Creatures (II) - 2B/1F/2G/3R
• Samus - 2B/0F/1G/3R
• Storyboards(I) - 2B/0F/1G/3R
• Storyboards(II) - 2B/1F/2G/3R
• World (I) - 1B/0F/1G/3R
• World (II) - 2B/1F/2G/3R

The content below is unlockable in the game. You must use credits earned in the game (of all four varieties) to unlock anything. Listed next to each piece of unlockable content is the number of each credits you’ll need to unlock said content. B = Blue Credits, F = Friend Credits, G = Gold Credits, and R = Red Credits.

• Bumper Stickers - 1B/2F/3G/3R
• Diorama (I) - 1B/1F/3G/3R
• Diorama (II) - 1B/1F/3G/3R
• Diorama (III) - 1B/1F/3G/3R
• Diorama (IV) - 1B/1F/3G/3R
• Diorama (V) - 1B/1F/3G/3R
• Diorama (VI) - 1B/1F/3G/3R
• Mii Bobblehead - 1B/2F/3G/3R
• Screenshot Taker - 1B/2F/3G/3R

The content below is unlockable in the game. You must use credits earned in the game (of all four varieties) to unlock anything. Listed next to each piece of unlockable content is the number of each credits you’ll need to unlock said content. B = Blue Credits, F = Friend Credits, G = Gold Credits, and R = Red Credits.

• Battle Theme (GF) - 2B/0F/1G/4R
• Battle Theme (Metroid) - 2B/0F/1G/4R
• Bryyo - 2B/0F/1G/4RM
• Bryyo (Thorn Jungle) - 2B/0F/1G/4R
• Gandrayda - 2B/0F/1G/4R
• Helios - 2B/0F/1G/4R
• In the Cockpit - 2B/0F/1G/4R
• Omega Ridley - 2B/0F/1G/4R
• Phaaze - 2B/0F/1G/4R
• Pirate Homeworld - 2B/0F/1G/4R
• Skytown - 2B/0F/1G/4R
• Steamlord - 2B/0F/1G/4R
• The Corruption - 2B/0F/1G/4R
• Title Screen - 2B/0F/1G/4R
• Valhalla - 2B/0F/1G/4R

You can get a friend voucher for performing certain tasks that you can trade with other players who have the game. Once traded, these can be used for buying special extras. Among other things, you get a voucher for every 100 kills (up to 1,000). An easy way to rake in 10 vouchers is to look for swarms of small, explosive bugs that crawl around the levels after the Space Pirates attack. Just sit there and zap 'em and you can get to 1,000 kills fairly quickly.

After finishing the game, a screenshot of your final scores (total time, percentage complete, et cetera) will be taken, which can then be seen anytime on the Wii Message page on your console.

The Hyper Missiles are earned in Hyper Mode after getting to Seed in Skytown. The Hyper Missile is the most powerful weapon in the game.

To unlock "Hyper Mode" difficulty, beat the game once on normal difficulty.

To get a special extended ending, beat the game with at least a completion at or above 75%.

Whenever Samus is in her ship, open her computer terminal (where there are eight button options, each a mysterious symbol). If you’re looking at the buttons from left to right, numbering them one through eight (for ease), insert the identical code Samus is given in the beginning of the game – 2-7-5-1. If entered correctly, a secret message from Nintendo’s very own Satoru Iwata plays in Japanese.

Whenever Samus is in her ship, open her computer terminal (where there are eight button options, each a mysterious symbol). If you’re looking at the buttons from left to right, numbering them one through eight (for ease), insert this code: 8-3-5-4. If entered correctly, a secret message from Nintendo’s very own Shigeru Miyamoto plays in Japanese.

By finishing the game with a 100% rating (meaning you picked up all one hundred pickups in the game), you will get a special ending.

Bowling for Bots: In Skytown, if you use Morph Ball to run over the Tinbots, you'll gain this bonus. Easiest place to do this is in the doughnut-shaped room.

Stylish Kill: In Skytown, there's a Bridge area that collapses when you cross it. Before it falls, there's a fight with Tinbots and the Master Bot. Ignore them and finish crossing the bridge. A cutscene with go off and show the bot fall to their doom.

To kill Helios easily, fire at the open spots on his body until he reveals his Phazon center. When he does this, quickly go into Hyper Mode, and then into Morph Ball mode, and attack him quickly for an easy kill.

In the room where you battle enemies in order to acquire the Nova Beam, keep fighting until you've killed at least twenty enemies before you physically acquire the Nova Beam. You'll get a friend voucher for your efforts.

In the Mining Zone of the Pirate Homeworld, use your gunship to destroy a Pirate Harvester. You'll receive a Friend Voucher in return.

To execute this cheat, you'll need 2 SD memory cards. Copy and save your game from your Wii to one card, and then go back to your game on one card and send out your Vouchers. After you receive your Vouchers in return, save your game to the other SD card (so that you have an old save and a current save). Whenever you want to send more Vouchers, just save your game to the current SD card, reload the old save game, and send out more. Then reload the current save to receive the Vouchers. In this way, you can easily get as many Friend Vouchers as you want.

To get a secret Friend Voucher, head to Bryyo and freeze the reptilian enemies that throw boomerangs at you. It requires great timing, but freeze them with your Ice Missiles when they throw a boomerang at you. The boomerang will come back at the reptilian foe and kill it. An on-screen message will confirm that you have indeed gotten the voucher.

Whenever Samus is in her ship, open her computer terminal (where there are eight button options, each a mysterious symbol). If you’re looking at the buttons from left to right, numbering them one through eight (for ease), insert this code: 3-6-4-8. If entered correctly, a secret message from Nintendo’s very own Kenji Yamamoto plays in Japanese.