"This article is related to a game that has not been released outside Japan. The coverage here may differ from what it would be in an official translation."
|Weak Spot||Anywhere as long as he doesn't have spikes|
|Species||Sea Sepent or Dragon|
|Fought At||Stranded Whale and Gabun Ocean Trench|
|Residence||Inside The Whale and Gabun|
|First Appearance||Densetsu no Stafy|
|Latest Appearance||Densetsu no Stafy 3|
Densetsu no Stafy
In The events of Densetsu no Stafy, Bankirosu is swallowed by the whale. Inside his body, Bankirosu gives him a bellyache which causes him much pain. Starfy, after entering his body through its mouth, upgrades his spin attack and then confronts Bankirosu in an attempt to relieve the whale of its suffering. After Bankirosu is defeated, The Whale's bellyache resides.
In battle with Bankirosu, Starfy is surrounded by spiked walls. Bankirosu is invincible as he is covered in spikes and any attempt to attack him is futile. His attack involves curling into a ball and raming into starfy. In order to defeat him, Bankirosu must miss Starfy and hit the spiked wall instead. This will disable his use of spikes allowing him to be damaged with Starfy's spin attack. After taking damage, Bankirosu will re-grow his spikes and move faster. Once his life bar is defeated, Bankirosu will disapear completely.
Densetsu no Stafy 3
When Starfy, Moe, and Starly meet Gabun, the robotic sea creature, he is suffering form a stomach ache for an unknown reason. Gabun inccidentaly swallows the trio and, in order to get out, they must find the cause of his pains. Eventually, they meet up with hot–tempered Hirara who they believe to be the cause of his ache. After exiting Gabun's body along with Hirara, Gabun seems to feel better. Later, however, Gabun's ache returns, this time due to something else. Entering his body once more, Starfy, Moe, and Starly find that the true cause of his aches are the infamous spiny dragon, Bankirosu. Starfy then battles and defeats Bankirosu once more, ending Gabun's stomach ache for good.
The battle with Bankirosu in Densetsu no Stafy 3 differs greatly from the battle in Densetsu no Stafy. Here, the battle is set in a mechanical room with 12 doors, 3 on each side of the room. A switch in the middle rotates the room when hit by Starfy's spin attack. Out of the 12 doors, one of them will be glowing orange. If the room is rotated, the glowing door's new corresponding location spawns an eye block which are seen throughout the past levels of world 7. The block will fall to the bottom of the screen where it disapears. If the block hits Bankirosu on its way down, it will destroy his spikes and render him vunerable to an attack, like in the first game. After being hit by Starfy, Bankirosu will regenerate his spikes and the process must be completed 5 times. In the end, Bankirosu is defeated again and Gabun is peaceful once more.