There are a number of ways to treat this condition: ..
In Earthbound, the mushrooms that cause this condition are the Ramblin’ Evil Mushroom and the Shrooom! boss.
Mushroomized Effects
Mushroomized can cause remapping of controls in the overworld and characters ignoring commands in battle, as well as sometimes attacking other party members. ..
The remapping of your controls is annoying. It keeps changing frequently, meaning you have to relearn the new directions every time you play.
In-game effects can be incredibly harmful, causing players to feel overwhelmed and stressed. This can lead to them quitting the game or even taking their own lives.
The character will attack other party members, heal enemies, and generally be a pain.
The Mushroomized character is feeling funky!
Mushroomizing an enemy can give them a PSI ability that does various effects, such as increasing their damage, speed, and strength.
The Mushroomized characters will have a mushroom on their head in the overworld.
Healing Mushroomized (All Methods)
The blue-haired healer can help you get rid of mushroomized quickly by visiting hospitals in the game.
These guys will offer to buy the mushroom off the head of each affected party member for $50 a piece.
If you’re looking for a peaceful place to relax and take in the natural beauty of the Peaceful Rest Valley, you may want to visit the girl foraging for mushrooms. She’ll be located just after the area with the cave.
The player will be offered the same price to purchase the mushrooms from each character affected.
The third option is to visit the pink hot springs in Saturn Valley or Tenda Village. These hot springs will also remove the mushrooms.
Unfortunately, you cannot heal Mushroomized with PSI abilities.
There is a fourth method of removing the Mushroomized condition, but it means killing off the character that’s affected. So we’ll leave that decision up to you.