Ben 10, stage 3
You must beat this level with Ben, without dying. I played on easy. Kevin will do a series of attacks, and eventually get his hand stuck in the ground. He has 3 attacks. One that sweeps the lower level, one that pillars into the sky, and one that shoots 3 balls of fire. The two flower platforms are your biggest friend here, camp on those until he gets close, and then jump to the other one. Make sure youre ready to block after you jump, because he usually shoots 3 fireballs after you land. When his hand gets stuck, swoop in like a hawk and give him hell. Once its unstuck, back to the flower. Repeat until hes at 50% health - This starts stage 2 in the fight.
There will be pink shields to hide behind for this part, use them! youll be safe as long as you stay behind them. When they shatter and appear somewhere else, either dodge roll your way to them, or jump to them. Dont walk, theres a chance you could be hit hard. When his hand gets stuck in the shield, attack! repeat this again for the other hand, and when his head gets stuck, jump to the first platform, jump upwards and do his up-standard attack.