Bomberman Portable

The goal of every stage is to defeat all enemies, then find the exit door which is hidden beneath a random soft block; you cannot exit until all enemies are defeated.
Every tenth stage is a boss battle against a larger, stronger foe. Defeating the boss will complete the world, and return you to the World Map.

Each world has a unique environmental gimmick; see Stages for details. You can choose which world to enter via the World Map, though you must play them in order to unlock access to the next one.
Before each stage is the Setup Screen, where you can choose what items to equip, save your progress, or return to the World Map.

In Stage 5 of every world is a Key item; you must collect one in every World to unlock access to the final world. The World Map will display a key icon if you have collected it.

There are 10 worlds with 10 stages in each, for 100 stages in total.

Item Panels

Items are not immediately activated upon collection, but are stored in your stockpile. By default, Bomberman begins with only one bomb and a blast radius of one tile. You can scroll through your stockpile using the L/R Buttons, and equip an item by pressing the Square Button; this can be done during gameplay, on the pre-level Setup Screen, and even while the game is paused.

Only the Bomb Up, Fire Up, and Speed Up persist between levels; all other items are lost upon completing a stage or losing a life, and some only function for a limited period of time; see Items for details. All equipped items are lost if Bomberman loses a life.
You can carry up to 99 of each item in your inventory.

timer / exit

You are given 3 minutes to complete each stage. If the timer reaches 0, play will continue, but a Pontan will spawn from the exit every 6 seconds. Bombing the exit at any time will also spawn a Pontan to pursue you.

Bonus Stage

Completing Stage 5 of a world (and Stage 9 if you are revisiting a completed world) will take you to a Bonus Stage, where the goal is to defeat all Pontans within 30 seconds. Bomberman is invincible for the duration, and defeating all enemies will spawn 14 to 15 items for you to collect. Once the timer reaches 0, the bonus stage ends.

lives

Bomberman begins with 2 lives. If Bomberman loses a life, he will lose all equipped items. Once all lives are lost (that is, dying when the HUD reads "0"), it's Game Over, though choosing to Continue results in no loss of items or progress.

saving & loading

You can choose one of 3 files to play the game, and can save your progress at any time on the pause menu or Setup Screen, resuming at the start of the last-played level or on the World Map. You cannot copy or delete data between files, you can only overwrite it.

Battle Game

[coming sometime!]

Classic Game

This mode is unlocked once you complete World 10 of Normal Game. Its gameplay harkens to the original Famicom game, with comparatively simpler action across 50 stages.
Details on the Classic Mode can be found here.

Controls

Controls can be reconfigured in the Options screen.

In Normal Game, only the Bomb Up, Fire Up, and Speed up are retained between levels; they are reset to 1 if Bomberman loses a life. All equipped items are lost after completing a stage or losing a life.
You cannot equip items during boss battles; you must set your items ahead of time on the setup screen.

Bomb Up

Increases bomb stock by 1. Maximum of 8 (Normal Game).

Fire Up

Increases bomb blast radius by 1 tile. Maximum of 8 (Normal Game).

Speed Up

Increases movement speed. Maximum of 8 (Normal Game).

Full Fire

Maxes bomb blast radius to 8 tiles.

Bomb Down

Battle Game only. Reduces bomb stock by 1.

Fire Down

Battle Game only. Reduces bomb blast radius by 1.

Geta (Clogs)

Battle Game only. Reduces movement speed.

Bomb Kick

Allows you to walk into a bomb to kick it; kicked bombs can be stopped by pressing the Triangle Button. Cannot co-exist with the Bomb Pass.

Line Bomb

Double-tap the button to lay all your bombs forward in a row.

Power Bomb

The first bomb laid will have an 8-tile blast radius.

Remote Control

Bombs can be detonated at any time by pressing the X Button.

Penetration Bomb (Penetrate)

Bombs will penetrate through soft blocks.

Rubber Bomb

Kicked bombs will bounce back when they hit an object.

Landmine (Mines Bomb)

The first bomb laid is a landmine, which takes 1 second to submerge, only its sensor visible. If stepped on or struck by an explosion, it will rise and detonate.

Dangerous Bomb

A bomb that detonates in a circular radius. At 3 Fire Ups or lower, it will only detonate as a 3x3 square. At 4 to 7 Fire Ups, its explosion spans a 5x5 'circle', omitting the corners. At 8 Fire Ups, it covers the full 5x5 square.

Bomb Pass

Allows you to walk through bombs for 1 minute.

Wall Pass

Allows you to walk through soft blocks for 1 minute.

Fireman

Renders Bomberman immune to explosions for 30 seconds.

Fire Suit (Invincibility Suit)

Renders Bomberman immune to all damage for 30 seconds.

Glasses

Reveals all the items hidden inside of soft blocks.

Clock

Adds 1 minute to the stage timer. The timer caps at 9:59.

Heart

Allows Bomberman to survive one attack. Only one Heart can be equipped per stage.

1UP

An extra life.

Key

Found in Stage 5 of each world in Normal Game. Required to access World 10.

Question Mark

[battle info coming whenever!]

Skull

[battle info coming whenever!]

unlock Battle Game stages

Searchlight: Collect the Key item in Stage 10-5 of Normal Game.
Blow Me Down: Complete World 10 of Normal Game.
Pipes & Belts: Complete World 10 of Normal Game.

unlock Classic Game

Complete World 10 of Normal Game.

memory addresses

Addresses are referenced from the Japanese version in PPSSPP v1.2.1-31.
The game relocates memory every time a stage is loaded, so pointing to static addresses is difficult.