More browsing paths
Play Bio Miracle Bokutte Upa (Japan edition · Japanese) Online
Bio Miracle Bokutte Upa
Introducing the basic operations of ``Bio Miracle Bokutte Upa,'' how to inflate and send enemies, how to use them as scaffolding, underwater operations, and tips for the early stages of navigating through the 21 stages.
Browser play

Nintendo Entertainment System (NES) / Famicom — 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 Bio Miracle Bokutte Upa
Quick start
Hit the first enemy with B several times to inflate it, then try touching it from the side to send it flying. On steps you can't reach, don't erase the bulging enemies and get on top of them to use them as footholds. Hit the block with B to look for recovery or 1UP, and underwater use A in small increments to adjust the height. Aim for the treasure chest at the back of each area.
Controls
Use the cross button to move Upa up, down, left and right. Press A to jump and surface underwater. Press B to swing the Gala Sword to inflate enemies or open containers. START is the start and pause. You can change the difficulty level by pressing SELECT on the title screen.
Bio Miracle Bokutte Upa — About this game
``Bio Miracle Bokutte Upa'' is a side-scrolling action game in which the baby prince Upa adventures through 7 worlds with themes such as sweets, vegetables, and stationery. Enemies you hit with Gala Sword will inflate like a balloon, and if you push them, they will attack another enemy, and if you step on them, you can use them as a platform to reach higher places. Each world consists of 3 areas, and the goal is to find the treasure chest and boss at the bottom. The central strategy is not only to defeat the enemy, but also to leave them behind and utilize them.
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 · nes
- 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.