FusionDex

Vaportrum is quite fond of swimming, instinctively searching for the largest body of water nearby. It takes running leaps into lakes and oceans it finds, sending out massive waves as it dives in.

Thanks to its gargantuan jaws, which could shred thick metal plates as if they were paper, it was invincible in the ancient world it once inhabited. Vaportrum underwent a spontaneous mutation and grew fins and gills that allow them to live underwater.