Following info comes from Mega 34.
In this epiosde, there was a training session that involved Black and Red fighting each other.
Here's Darkpine.    
Here's a shot of Darkpine and Black on the ground after they landed after Black had punched Darkpine in midair.
Black used his Lance in Booster Mode in order to fire at Darkpine and it caused the bracelet on him to fall off and to break which broke the spell on the kids that had spells on them.
Here's Giant Darkpine. Darkpine grew the normal way, with Hyprus biting him.
Here's a shot of Mega Voyager and Darkpine.
Darkpine is destroyed by the Mega V3 Missile Mode.