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Play All-Star Baseball 2003 (US edition) Online
All-Star Baseball 2003
Play All-Star Baseball 2003 online with GBA Quick Game, Exhibition, batting practice, season, World Series, pitching, fielding and roster management.
Browser play

Game Boy Advance (GBA) — EmulatorJS controls
Default Player 1 keyboard mapping. Change keys in Controller Settings.
| Console button | Keyboard |
|---|---|
| ↑ / ↓ / ← / → | ↑ / ↓ / ← / → |
| A / B | Z / X |
| L / R | Q / E |
| START / SELECT | Enter / V |
Open Controller Settings to configure your keyboard or gamepad. Touch controls are available on mobile.
How to Play All-Star Baseball 2003
Quick start
Press START, choose Single Player and Quick Game for the shortest setup, then pick which randomly selected team to control and a difficulty. At bat, begin with contact swings and move the target onto the pitch; on defense, use the red landing marker and switch fielders early. Batting Practice is available before starting a season.
Controls
Hitting: D-Pad moves target, A swings, B bunts, R+D-Pad tilts target, SELECT toggles contact/power. Pitching: D-Pad selects/aims, A confirms/throws, B+D-Pad attempts a pickoff, L/R adjust outfield/infield. Fielding: D-Pad moves, A switches or A+D-Pad throws, B dives/jumps, L relay. START pauses.
All-Star Baseball 2003 — About this game
Modes include Quick Game, Exhibition, All-Star Game, batting practice, Home Run Derby, Season and World Series; two-player play uses a link cable.
All-Star Baseball 2003 Game manuals
Cheats
No cheats have been added for this edition.
Player verification and sources
Browser play was reviewed before this edition was published in the catalogue. The date below is the catalogue publication date, not the game’s original release date.
- Browser test and catalogue publication date
- Browsers and devices
- PC: Chrome, Edge and Firefox. Mobile: Chrome on Android and Safari on iPhone and iPad.
- Player engine and core
- EmulatorJS 4.3.0-pre · gba
- Tested by
- rwEmulator
Sources and editorial basis
rwEmulator reviews edition metadata, release information, game manuals and first-hand browser-play notes. Available manuals are linked below; the editorial policy explains how facts are checked and corrections are handled.