Circuits - Successfully complete the indicated task to unlock the corresponding circuit:

Big Bang Circuit: Finish in first, second, or third in the Universal Circuit.

Comet Circuit: Finish in first place in the Planet Circuit.
Cosmos Circuit: Finish in first place in the Supernova Circuit.

Galaxy Circuit: Finish in first place in the Cosmos Circuit.

Meteorite Circuit: Finish in first place in the Sunlight Circuit.
Moonlight: Finish in first place in the Mercury, Venus, Jupiter, and Saturn Circuits.

Planet Circuit: Finish in first place in the Stardust Circuit.

Satellite Circuit: Finish in first place in the Comet Circuit.
Stardust: First in first place in the Moonlight Circuit.
Sunlight Circuit: Finish in first place in the Satellite Circuit.
Supernova Circuit: Finish in first place in the Meteorite Circuit.

Universal Circuit: Finish in first, second, or third in the Galaxy Circuit.

Events - Successfully complete the indicated task to unlock the corresponding event:

400m Hurdles: Win the Sunlight Circuit.
400m Race: Win the Planet Circuit.
4x100m Relay: Unlock the Moonlight Circuit.

Archery Event: Unlock the Stardust Circuit.

Dream Fencing: Win the Comet Circuit.
Dream Platform: Unlock the Galaxy Circuit.
Dream Race: Unlock the Moonlight Circuit.
Dream Table Tennis: Win the Satellite Circuit.

High Jump: Play as all characters.

Pole Vault: Unlock the Supernova Circuit.

Single Sculls Event: Unlock the Moonlight Circuit.

Vault: Unlock the Cosmos Circuit.

Advanced Class - Finish the Moonlight Circuit in first place to unlock the Advanced Class.

Crowns - Get gold medals in all the events with a character to unlock his or her crown.

Alternate ending sequence - Finish the Big Bang Circuit in first place to view an alternate ending sequence.

Character Emblems - Successfully complete all missions for a character in Mission mode to get their character Emblem. You can set the character Emblem as your icon. For example, successfully complete all of Sonic's missions to get the Sonic Emblem.

Emblems - Successfully complete the indicated task to unlock the corresponding Emblem:

Aquatics Champs Emblem: Get gold medals in all Aquatics events.

Bouncing Emblem: Get a perfect 10 on the Trampoline.

Collaborative Emblem: Play with all the characters.
Complete Game Emblem: Unlock all events.

Dream Champ Emblem: Get a gold medal in all Dream events.

Field Champ Emblem: Get gold medals in all Field events in Single Match mode.
Friendly Emblem: Play an event with two to four Players.
Full Play Emblem: Play all events.

Gallery Owner Emblem: Unlock everything in the gallery.
Gymnastics Champ Emblem: Get gold medals in all Gymnastics events.

Hunter Emblem: Get 120 points in Archery.

Knight's Emblem (Fencing): Have a 15-0 record in Individual Epee.

Network Emblem: Connect to the Nintendo WFC Rankings.

Olympic Record Emblem: Break an Olympic Record.

Penalty Emblem: Commit a foul in the 100m Dash.
Ping Pong Emblem (Table Tennis): Win 11-0 in Singles Table Tennis.
Planet Circuit: Get any medal in the Stardust Circuit.

Rocket Emblem: Successful start dash in 100m Dash.

Shooting Emblem (Shooting): Get 40 points in Skeet.
Somersault Emblem (Vault): Get a perfect 10 on the Vault.

Thanks for Playing Emblem: Start the game 50 times.
Track Champ Emblem: Get gold medals in all Track events in Single Match mode.

World Record Emblem: Break a World Record.

Gallery Music - Successfully complete the indicated number of mini-games (all five rounds) in the gallery to unlock the corresponding song:

Green Hill and Overworld: One mini-game
Sonic 2 Special Stage and Underwater: Three mini-games
Star Light and Underground: Two mini-games
Super Mario World Ground BGM and Let The Speed Mend It: Five mini-games
Super Mario 3 Ground BGM and Sonic Heroes: Four mini-games