The Glutton's Kitchen is likely the second or third cavern you'll enter in the Perplexing Pool. To enter the cave, you'll need to have found Yellow Pikmin, and you may need plenty of them. You will probably already have built and cleared a route to the cave, which involved killing several enemies, including Shearwigs, and building a bridge, if applicable, so take your yellows, maybe 50 or so, along with several other Pikmin, especially Purple Pikmin, and head towards the area where you may see three eggs, there you should easily see an electrical gate, and a Yellow Wollywog nearby, it would be useful if you eliminate it and then destroy the gate. Once that is done, proceed on in. A Honeywisp may also be nearby.