The Tochukaso mushroom is a fungus exclusive to the Pokemon Universe. Tochukasu is the Japanese name for a caterpillar fungus, which infects an insect host and changes its behaviors. However, caterpillar fungus and Tochukaso look nothing alike. The Tochukaso mushroom has a red cap that is covered in yellow spots, and it has a beige stem. If I compare it to an actual mushroom, I’d suggest its closest counterpart would be a fly agaric. A similarly poisonous red mushroom, but a fly agaric has white spots instead of yellow.