Sega Superstars Tennis - Bonus characters

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.

Bonus stages:
Complete the indicated task in Superstars mode to unlock the corresponding stage.

Alex Kidd: Complete "Get A High Score" in the "Space Harrier" stage.
Outrun: Complete "Hit Justice Shots" in the "Virtua Squad" stage.
Space Harrier: Complete Tournament Singles in the "Space Channel 5" stage.
Virtua Squad: Complete "Hit The Big Zombies" in the "Curien Mansion" stage.

Achievements:
Complete the following achievements to unlock Xbox Live Gamerscore points.

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