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Play All-Star Baseball 99 (US edition · English) Online
All-Star Baseball 99
Play All-Star Baseball 99 online for Game Boy. Manage batting, pitching, fielding and baserunning in a baseball game with exhibition, season and practice options.
Browser play

Game Boy (GB) — EmulatorJS controls
Default Player 1 keyboard mapping. Change keys in Controller Settings.
| Console button | Keyboard |
|---|---|
| ↑ / ↓ / ← / → | ↑ / ↓ / ← / → |
| A / B | Z / X |
| 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 99
Quick start
Press START for setup and begin with an exhibition or batting practice. Use B for a swing and A for a bunt; when pitching, select location, type and speed with the D-pad and B. START returns to earlier setup screens.
Controls
Batting: B swings, A bunts; direction modifies contact. Pitching: D-pad selects, B confirms location/type/speed. B+base direction advances runners, A+base direction returns them. Fielding: D-pad moves; B throws toward the chosen base when holding the ball. START opens options.
All-Star Baseball 99 — About this game
Manage batting, pitching, fielding and baserunning in a baseball game with exhibition, season and practice options. Pitching separates location, type and speed into decisions, while batting offers full swings, bunts and directional contact. Fielding switches to an overhead view, and runners can advance or retreat independently. Team lineups and bullpen choices bring management decisions into the flow of a game. Press START for setup and begin with an exhibition or batting practice. Use B for a swing and A for a bunt; when pitching, select location, type and speed with the D-pad and B. START returns to earlier setup screens.
All-Star Baseball 99 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 · gb
- 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.