Fat Enemies Type 2 are bigger but slower than Type 1.
They surely are worst than Type 1, they shot an intermittent laser moving from top to bottom and vice versa.
Try to kill them as they spawn and avoid the laser if you can when it interrupts for a couple of seconds.
They can be found in:
Level 3 - Wind Zone
Level 6 - Philosopher's Path
Level 9 - The Swamp