Beast Shooter - Mezase Beast King! (Japan)
GBA

Beast Shooter - Mezase Beast King! (Japan)

Released in 2002 exclusively for the Nintendo Game Boy Advance (GBA) by Konami, Beast Shooter - Mezase Beast King! is a Japan-only quirky blend of side-scrolling shoot 'em up action and monster-collecting role-playing elements that stood out on the handheld platform. Unlike traditional shmups that focus only on tight reflexes, this title weaves in a light progression system where players defeat wild beasts across multiple themed zones to collect their abilities and work toward claiming the title of Beast King. The game is set across six distinct regions, each with its own ecosystem of beast types, from forest-dwelling flying beasts to volcanic fire-aligned creatures that test your dodging skills. Konami built the game around GBA's hardware, delivering smooth scrolling and vibrant, colorful sprite work that still holds up for retro fans today. The narrative follows a young beast hunter who enters the annual Beast Tournament, where only the strongest hunter that defeats the top beast at

No download required
Save states supported
Works on mobile & desktop

The emulator loads after you press Start Game.

How to Play Beast Shooter - Mezase Beast King! (Japan)

Move
WASD
ABAction
JK
XYShoulder
L;
STStart/Select
21

Save & Load States

  • F2Press F2 to save your current game state at any time.
  • F4Press F4 to load your last saved state.
  • F3Use F3 to switch between save slots.

Save states are stored locally in your browser. They persist across sessions but are cleared if you clear browser data.

Customize Controls

Click the gear icon on the emulator toolbar → "Controls" to remap keys.

Move
WASD
Action
JK|L;
System
2 Start1 Select
Save
F2SaveF4LoadF3Slot

Default layout for GBA. Remap in emulator settings.

About Beast Shooter - Mezase Beast King! (Japan)

Beast Shooter - Mezase Beast King! (Japan) is a classic GBA game you can play online for free in your browser. No download or installation is required — click "Play Now" to start instantly. Relive the experience of vintage console gaming with authentic gameplay, right in your browser on any device.

This title is part of the PLAYERETRO game collection, which features over 1000 classic titles across multiple systems. Use the keyboard controls shown above to move and interact. Save your progress with save states and enjoy Beast Shooter - Mezase Beast King! (Japan) anytime, anywhere.

Play Beast Shooter - Mezase Beast King! (Japan) online for free at PLAYERETRO. This 2002 Konami Japan-exclusive GBA title blends side-scrolling shoot 'em up action with monster collecting, as you batt

Game Guide

To get the most out of your playthrough of Beast Shooter - Mezase Beast King!, start by mastering the core GBA controls first: the A button fires your standard main weapon, the B button performs a dodge roll that lets you pass through enemy projectiles without taking damage, and the L/R shoulder buttons cycle through your captured beast special attacks. Early on, prioritize capturing common beasts to build a diverse move pool instead of just defeating every enemy you encounter. For example, the Grass Wing beast found in the first forest zone has a wide horizontal spread attack that is perfect for clearing swarms of small enemies, making it a valuable addition to your loadout for the entire game. To capture a beast, you must lower its health to below 20% without killing it, then use a capture orb. You only get 3 capture orbs per zone, so save them for rare or high-utility beasts. For boss fights, learn each boss's attack pattern to exploit weaknesses: the Volcano Zone's Flame Titan boss spends most of the fight firing slow tracking fireballs that are easy to dodge, so save your strongest water-aligned special attack for when it opens its core to deal massive damage and end the fight quickly. Between zones, always spend your collected beast currency on upgrading your max health and extra lives first, as the late game has a sharp difficulty spike that will overwhelm underprepared players. When you reach the final battle against the current Beast King, bring at least one healing ability and a piercing special attack that can break through his defensive barriers. Wait for the short vulnerable window after his full-screen laser attack to unleash your strongest attacks, and you will claim the title of Beast King in no time.