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Doppel is a boss in Densetsu no Starfy that is created by Ogura at the Undersea Temple. He looks like Starfy only he's green with intimidating yellow eyes and is usually bigger. After being told to defeat Starfy, he rampages around, saying that he stronger and cooler than Starfy is. Horun tries to stop him from further damaging the Undersea Ruins, but fails to. He makes a cameo appearance in Densetsu no Starfy 4. He can be touched on the Cupid Village level select for extra Pearls.
Doppel's sprite
Attacks
Doppel's attacks consist mostly of rolling around the arena to crash into Starfy. Starfy must hit Doppel with his Spin Attack while at the same time avoiding touching Doppel. Once Starfy has accomplished this, Doppel will make a dizzy animation, and Starfy will have a chance to attack. Sometimes, before Starfy can hit him or two one more times to deal critical damage, Doppel can burrow into the ground and reappear in one side of the screen to cancel Starfy's chance to deal damage. Doppel can also make trick Starfy to hit him while invunerable. When this happens, Starfy will go right through him, and Doppel will quickly attempt to smash Starfy against the nearest wall. Then, Doppel will roll around the sides and edges of the screen until Starfy deals the next three hits. If the player battles Doppel again after defeating Ogura, each time Doppel makes his dizzy animation after being hit three times by Starfy, three smaller versions of Doppel will eject from him, and will try to attack Starfy before rapidly swimming off the screen.
Doppel uses the pronoun Ore (オレ) to refer to themselves. This is in contrast of Starfy's use of Boku (ボク), which has more timid and well-behaved connotations compared to the wild and informal connotations of Ore.
Boss: Doppel 
The Legendary Starfy series bosses
