The Smurf From the Ashes achievement is worth 30G and is unlocked by freeing the Phoenix without getting hit.

This is the boss fight at the end of the Lava Jungle world. He will first throw rows of fireballs at you with gaps in them. Obviously avoid these by slipping through the gaps. On the second wave you'll do the same as the first but he'll then spit flames that sweep half of the screen. Just look for his movements to see what he's going to do next.