Spark Mandril

Spark Mandril - Heart Tank
There are three ways to grab the heart tank 
 
 Snag it with a boomerang from a dash jump from the left platform. 
 Climb the left wall underneath with boomerangs equipped. Do a neutral dash jump off the wall (release the D-Pad), and once X stop moving horizontally (but is still moving up), fire a boomerang. It will collect the heart. 
 Do a dash jump off the wall around the ledge and climb up to collect it.