Doom Paradise (Insane) is the Continuation Stage in Bad to Worse. It is very similar to the previous stage, except the second boss now spawns when the base is damaged and every enemy is now Black instead of Red. When completed for the first time, it will give an Epic Catfruit. Any further successful clears will yield Cat CPUs.
At the start of the battle, Those Guys will begin to spawn, followed by Doge Darks, and after a few seconds Bun Bun Black will spawn as well. After the enemy base takes damage, Shadow Boxer K, Gory Blacks and Doge Darks will emerge from the base alongside Director Kurosawah and the Black Cyclone. Two Cans will begin to spawn about 6min 40s afterwards.
Focus on heavy damage dealers and the slow and freeze effects over knockback. You want to ideally draw the bosses out and maintain your distance from Director Kurosawah so he doesn't destroy your front line. Be aware that this is a timed stage, as Two Cans will spawn after some time and possibly cause you to lose the battle. Just like the last stage, beware the boss shockwaves.