Funguy (キノコ,Kinoko?), in Chrono Cross, is Lisa's father of Home World, who avidly collects mushrooms and helps oversee their Elements shop in Termina. His body has been mutated by a rare form of mushroom giving him the appearance of a mushroom man.
"Well, I guess it's time for me to head back to the forest. You know, I really don't mind the way I look anymore. So don't worry about it. Well, good-bye!" — Funguy
His travels often took him to Shadow Forest, where he used a small cave beneath a waterfall to prepare his fungi. After Serge rescued Riddel from Porre at Viper Manor, he came into possession of a special Mushroom from the Guardia region; Funguy inspected it and ate it at once, savoring its rich taste. The mushroom mutated his body, however, giving him some abilities and properties that normally belong to fungi. He forcefully joined Serge's party with the intent of using the Frozen Flame to change back to normal. Upon their travels at Termina in Another World. Funguy sadly upset to see his dimensional counterpart who remains in his human form and was ill and being taken care of by his daughter Lisa and became frustrated after seeing the human form of his dimensional counterpart. After the Terra Tower rises, Funguy also decided never to eat more spores when he encounters one of the spores at the Shadow Forest and it was revealed to be alive and Funguy learns that they were his offspring from his spores and learns his "Myconoids" technique.
Earn a mushroom by either 1) if you covered the hole in the sewers under Viper Manor (Home World), catch the bug which is to the bottom right of the screen (next to a rock, unmoving), or 2) in the Shadow Forest cave fight the Wraith near the hole and save the boy if you didn't close the hole. Then give the mushroom to the man under the waterfall in Shadow Forest.