After much trial and error here's what I've figured out:
- Once Kyzor enters the trash phase, any lightning attack risks glitching him out such that further progression is impossible. Consequently, lightning should be ignored once the phase transitions.
- Trash removal can be accomplished by any non-lightning card that equals the armor. The strength of the card does not matter. However, the cards activation has to be timed so that several seconds after it is triggered-- when the bubble animateion finishes-- a piece of trash is present directly in the center of the attack animation. This timing is pretty precise, so I'd recommend healing up two or three times between attempts.
- Once all the trash is cleared the fight enters round 3, which the game calls round 2. This is the same as round 1, except you win if you beat him. When you win the game suggests there's at least one other possible outcome to the fight, and that outcome is better.
- healing Kyzor back to full health in stage 3 is not the solution.
-Even if you win, the icon on the map will not be filled in and your stats for the fight will not be displayed on the cloud.