Ravenous Whiskerpillar

The Ravenous Whiskerpillar is a whiskerpillar that is not harmful to Pikmin, but dangerous to Burgeoning Spiderworts. They remain under the ground near the locations of Burgeoning Spiderworts, appearing only when the plants bloom, at which point they proceed to burrow out of the ground, climb the plants, and then eat the berries directly off of them. This act is detrimental to leaders, as berries are necessary to make sprays. When confronted on a Burgeoning Spiderwort, a Ravenous Whiskerpillar will drop off the plant and burrow into the ground, providing a chance to attack it. Strangely enough, when killed, they don't seem to be dead; carrying them will make them squirm and emit more of their hissing, and a soul does not appear. As they are pulled into an Onion, they struggle and hiss even more rapidly.

In Pikmin Kart
The Ravenous Whiskerpillar is an item in Pikmin Kart that appears in item boxes commonly. When used, a Ravenous Whiskerpillar appears on the screen of another player who has an item. It will partially block their view and will eat the item that they are holding, causing it to disappear. It will eat items that have not stopped spinning yet, and if no kart has an item, then it will have no effect.

In Pikmin V
Ravenous Whiskerpillars appear in their usual capacity throughout the Forest of Seeming region of Pikmin V. They have received one notable upgrade, in defiance of Olimar's previous notes, which is the ability to complete their metamorphosis into an adult. If a Ravenous Whiskerpillar consumes ten spiderwort berries of any kind and lives to the end of the day, it will pupate into a Whiskercoon the following day. If the Whiskercoon is not destroyed that day, it will become a Ravenous Whiskerfly on the following day as well.

In Pikmin: The Winds of Light
Ravenous Whiskerpillars in Pikmin: The Winds of Light appear in Summoning Garden and Spring of Serenity, both times near the Burgeoning Spiderworts in those locations.