Play as a Ro-Bro
While on the stage select/map screen, press L1, L2, L3, R1, R2, R3, Select and Start at the same time to play as a Ro-Bro. Input the code again on the same screen to revert back to normal.
Contributed By: ShinChuck.
Concept Art Gallery
Complete the game once and the Concept Art Gallery will unlock on the main menu, with 97 pages of unused concepts, drawings, and early game screenshots.
The harder the difficulty, the higher the drops from enemies.
Unlockable How to Unlock Double Dragon Difficulty Beat the game in "Dragon" difficulty Dragon Difficulty Beat the game in "Normal" difficulty
Set Fuzz Face Free!!
Fuzz Face is a strange, flying friend with a very high-pitched voice. If you set him free by ducking seven times between the two tombstones right beside the ladder in stage 6, he will follow you around and drop Dragon Kick and batteries every minute or so making the game substantially easier. Just be warned that his voice is severely annoying.
Secret Area before Giga Skullmageddon
On the very last stage of the game, after becoming a Ro-Bro, head left. Eventually, you will reach the left side of the screen. When you do, head down. You will climb down a hidden ladder with multiple 1-ups, and two unlockable chests.
Contributed By: giantnine.
Secret Roper Level
In stage 7 where you start off with the heavy bag in the glass cell, punch the bag 87 times to hear a chime and wait a few seconds. Your head will be replaced with Roper's and every enemy in the stage also has their head swapped as well. This stage is VERY difficult.
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