| Unlockable: | How to Unlock: |
| Alex Kidd | Complete Tournament Singles in the "Alex Kidd" stage. |
| Amy Rose | Complete Tournament Singles in the "Sonic The Hedgehog" stage. |
| Gilius Thunderhead | Complete Tournament Singles in the "Golden Axe" stage. |
| Gum | Complete "Tournament Doubles" in the "Jet Set Radio" stage. |
| MeeMee | Complete Tournament Singles in the "Super Monkey Ball" stage. |
| Pudding | Complete Tournament Singles in the "Space Channel 5" stage. |
| Reala | Complete Tournament Singles in the "NiGHTS" stage. |
| Shadow the Hedgehog | Complete "Tournament Doubles" in the "Sonic The Hedgehog" stage. |
| Unlockable: | How to Unlock: |
| After Burner (20 pts) | Hit a serve over 100mph / 160kph. |
| Ball Buddies (30 pts) | Win 5 Xbox Live Doubles matches. |
| Beat them All (30 pts) | Beat all characters in Singles matches. |
| Cameo Appearance (20 pts) | Hit a Sega court cameo. |
| Challenges 101 (30 pts) | Complete all Challenges in all Sega games (Rank A). |
| Classic Complete (20 pts) | Complete all Challenges in one Sega game (Rank A). |
| Climb the Ladder (20 pts) | Win the final stage in Tournament mode. |
| Dragon Slayer! (20 pts) | Destroy the Final Squilla in under 20 seconds!. |
| Full Roster (30 pts) | Unlock all Secret Characters. |
| Let's Get Friendly (20 pts) | Win 10 Xbox Live Player matches. |
| Magical Sound Shower (30 pts) | Unlock all Secret Music Tracks. |
| Master Tagger! (20 pts) | Clear a Tag without missing a shot!. |
| Mouse Mania! (20 pts) | Rescue 500 ChuChus over time!. |
| Original Teams (30 pts) | Beat all the classic Doubles pairs. |
| OutRun (20 pts) | Run a total of 10 kilometers / 6 miles. |
| Party Time (30 pts) | Play each type of Ball Game Multiplayer. |
| Play Ball (10 pts) | Win your first match. |
| Play the Field (30 pts) | Unlock all Secret Courts. |
| Pot Black! (20 pts) | Clear 4 Trick Shots in one game!. |
| Puyo Puyo! (20 pts) | Clear a 20 Puyo combo!. |
| Score Attacker (30 pts) | Unlock all Ball Games. |
| Secret Stage (30 pts) | Beat the hidden stage in Tournament mode. |
| Seeing Stars (20 pts) | Enter Superstar mode 10 times in a match. |
| Sega Rally (20 pts) | Hit a 40 shot rally. |
| Space Channel 5 (10 pts) | Watch a match on TV. |
| Starting Grid (10 pts) | Win with all 8 starting characters. |
| Step into Sega World (10 pts) | Complete your first Challenge (Rank A). |
| Super Sonic (20 pts) | Collect 7 Chaos Emeralds in one game!. |
| Supercop! (20 pts) | Destroy Kong without being hit!. |
| Surf the Net (10 pts) | Win a Match on Xbox Live. |
| Swinging Report Show (30 pts) | Become a TV Superstar. |
| To be this good takes AGES (60 pts) | Complete all Challenges in all Sega games (Rank AAA). |
| To The Max (20 pts) | Hit 3 Max serves in a row. |
| Top Gun (20 pts) | Hit 100 aces. |
| Top of the Tree (20 pts) | Win a Tournament on Xbox Live. |
| Top Ranker (20 pts) | Win 10 Xbox Live Ranked matches. |
| Zombie Hunter! (20 pts) | Hit an 8 zombie combo!. |