Devihart

''"...This Pettomon can cause mass damage in a large area when it eats a Power-Up..." - in-game description''Devihart is a fire type Pettomon that automatically eats Power-Ups and shoots homing fire bullets.

Appearance
Devihart is a heart-shaped creature with stubby horns, bat wings and a black-spaded tail.

Effectiveness
Devihart's special ability allows it to eat Power-Ups in exchange for massive damage in a large area of the screen. That coupled with its homing ability and nearly equal damage per second as Flamster makes it a very tough rival.