MARIO: From the beginning.
LUIGI: After you save him from Spook Spook Galaxy
YOSHI: After you save him from Yoshi Egg Galaxy
WARIO: After you save him from Wario Stadium Galaxy.
WALUIGI: After you save him from Turvy-Topsy Galaxy.
DONKEY KONG: After you save him from DK’s Lost Galaxy.
DAISY: After you save her from Flower Bloom Galaxy.
BIRDO: After you save her from Yoshi Egg Galaxy in a secret level.
ORANGE LUMA: From the beginning.
BABY MARIO: From the beginning.
BABY LUIGI: After player one rescues Luigi from Spook Spook Galaxy.
TOAD: After player one helps the Toad Brigade return from Honey Blossom Galaxy.
DRY BONES: After player one defeats Giant Dark Bones in Dry Dry Desert Galaxy.
TOAD BRIGADE CAPTIAN: After player one saves him from Mushroom Mountain Galaxy.
GEARMO: After player one helps a Gearmo get a pet Luma in Space Trash Galaxy.
DIDDY KONG: After player one rescues DK from DK’s Lost Galaxy.
THE CHIMP: After player one completes all of the Chimp’s six challenges.
POWER STAR TYPES
Princess Peach once again invites Mario to her castle and says a special surprise awaits him... Mario travels to the castle, only to find that Bowser and his minions have captured her, along with many other friends and even foes! Then Luma appears, telling Mario that the castle really isn't there and that the letter was really to lure Mario into a trap! A bright flash of light engulfs Mario and Luma, and they are teleported to the Combination of the Past Galaxy. Luma tells Mario this is a very strange galaxy, as it seems to be two galaxies in one! They find a Grand Star at the very center, where they are teleported to Luma Galaxy, the "hub" area of the game. A new adventure is about to unfold...
A Blast From the Past
(((NOTE: The "Combination of the Past Galaxy" cannot be visited again until all stars have been collected, all secret areas are visited/completed, all enemies discovered, have at least 7,000 Star Bits, have over 40 lives, and the completion of the game. You can keep playing after the final boss is defeated, then go to the most distant planet in the Luma Galaxy. There is a new dome there, labled "???". Inside is only one galaxy, the Combination of the Past Galaxy.)))
Soaring In The Sky
Chasing Down The Sky Bullies
Big Bad Lakitu
The Secret Sky Station (Secret)
To The Tip Top Of The Big Tree
The Treetop Temple
The Silver Stars Of Treetop
Honey Blossom Galaxy (Extra)
The Sacred Mushrooms Of The Bees
The Chimp’s Spin Challenge (Secret)
The Frozen Fortress
The Cloudy Forecast
The Underwater Cavern
Luigi And The Haunted House
King Boo’s Secret Tower
The Return Of King Boo
Down Below The Mansion (Secret)
Flip Pad Galaxy (Extra)
Flipping Down The Road Of Pads
Huge Danger With Giant Goombas
The Secret Thwomp Island (Secret)
Infiltrating The Airships
Yoshi And The Return Of Fiery Dino Piranha
The Fast-Running Dash Pepper
Beneath The Volcano (Secret)
The Chimp’s Speed Challenge
Birdo And The Return Of Gobblegut (Secret)
Toxic Fumes Galaxy (Extra)
Through The Toxic Wasteland
The Perilous Penguin Problem
The Great Penguin Race
The Undersea City
The Magical Magma Ocean
The Return Of Fire Gobblegut
The Fiery Castle
Through The Pools Of Quicksand
Confronting The Giant Dark Bones
Up To The Top Of The Pyramid
Sandy’s Sandy Sinkhole
To The Top Of Icile Mountain
A Brush With Baron Burn
Rocking Down Rolling Road
Terminating The Trash Titan
The Chimp’s Roll Challenge (Secret)
Daisy And The Return Of Peewee Piranha
Dry Dry Patrol
A Race Through Daisy Plaza
To The Top Of The Toxic Tower
Sand Swirl Galaxy (Extra)
Picking A Favorite Treat
Below The Starshine Mountains
Through The Fogs Of Darkness
The Undersea Castle
Storming The Sunshine Starship
Rescue The Toad Brigade Captain
The Chimp’s Cloudy Challenge (Secret)
Super Gigantic Galaxy (Extra)
A Huge Problem With Giant Piranha Plants
Over-sized Enemy Battalion
Trick Tower Galaxy
The Tall And Tricky Tower
Silver Stars In The Tricky Tower
Bowser’s Burning Star
The Fiery Festival
Boo Beach Galaxy
The Airborne Fortress
Beating The Big Bad Boos
Waluigi And The Topsy-Turvy Topman
Coral Cove Galaxy
The Crumbling Coral Cavern
A Walk On The Snowy Side
Bowser Jr’s Shadow Reactor
The Shadowy Star
DK’s Lost Galaxy
Discovering The Long Lost Land
Donkey Kong And The Abandon Mine
Diddy Kong And The Return Of Mega Leg
Dixie Kong And The Revenge Of The Topman Tribe
Funky Kong And The Secret Island
Bowser’s Secret Jungle Reactor
Wing Time Galaxy
Let’s Wing It
Infiltrating The Fortress
To the Core of the Fortress
The Chimp’s Dodge Challenge (Secret)
Stormy Mountain Galaxy
Through The Thunderstorm
Cloud Castle Galaxy
To The Top Of The Tallest Tower
The Chimp’s Wall-Jumping Challenge (Secret)
Dive Deep Galaxy
Diving Down Into The Dark Depths Of The Deep
Bowser’s Universal Reactor
The Fate Of All There Is
Grand Goomba Galaxy
Down The Goomba Boardwalk
The Island Out At Sea
Shy Guy Shore Galaxy
Ray Surfing Down Shy Guy Shore
Riding Down Rainbow Road
Ultima Galaxy (Extra)
A Great Challenge
The Final Trial (Secret)