"Hyper Bubbles" is considered Bubbles's second phase. Only shows if she's really PO'd, or if Bubbles is at 0 HP. You can thank Reaper for coming up with this as a sort of failsafe, just in case Bubbles dies in a battle with the villains.
Attacks "Hyper Bubbles" has:
1 (Blue). Normal. Increased strength, speed, and gains the power of flight.
Special attack: a massive tornado that just swirls around her, demolishing anything in its path.
2 (Red). DETERMINATION. This attack variant is based on Chara, so her attacks are mostly knives here.
Special attack: A battle axe and a full blown suit of armor, based off the Humans v. Monster war in the original game.
3 (Purple). Cosmic Nightmare/PERSEVERANCE. This attack variant uses light-based attacks, and illusions to mess with your mind. This variant also only speaks in rhymes, so unless you can decipher what she's saying, it's gonna be a literal nightmare to deal with the fight.
Special attack: A massive hammer made of light. Need I say more?
4 (Green). Recharge/KINDNESS. This variant mainly attacks using healing items turned bad, and if someone takes damage because of these items, there's a small heal for herself, or her allies.
Special attack: A frying pan. Makes sense.
5 (Yellow). Sharp Shooter/JUSTICE. It's basically the yellow soul from the MTT fight.
Special attack: Machine gun. I can't explain it better than that.
6 (White). Color Blaster/HOPE. Final attack. Exactly what separated Shattered from Dream. It's mainly a last resort, because not only is it that overpowered, it will immediately revert Bubbles back to normal.