Jumbo Bulborb

Jumbo Bulborbs are giant Red Bulborbs and are never seen asleep. To hunt, they either patrol an area or hide within some vegetation as an ambush tactic. Upon spotting Pikmin or leaders, a Jumbo Bulborb will run toward them, scream, and then proceed to lunge at them three times in an attempt to eat them. If it manages to catch any, it will stand up and eat them; otherwise, it will trip and try again. If a lot of Pikmin are attacking it, it will shake them off and then immediately begin lunging.

=In fanon games=

In Pikmin: The Huge Debt
The Giga Bulborb is a humongous grub-dog in and a main part of the storyline of Pikmin: The Huge Debt. When Red Pikmin, Blue Pikmin, Yellow Pikmin, Purple Pikmin, and White Pikmin have been discovered and Peril Cliff is visited, a cutscene will play when the area is landed in. The Ship will land and the Onions for some reason won't come down. Olimar beams down, and suddenly the Giga Bulborb will eat the ship whole and chase Olimar. Then while being chased, Pikmin of all colors above will jump down and help Olimar chase the Giga Bulborb to rescue the ship.

In Pikmin: Spider Attack
The Mega Bulborb is a gargantuan grub-dog encountered in Pikmin: Spider Attack. It is one of the first enemies encountered, despite it also being the first boss.