Foongus is a small Pokémon that resembles a mushroom. The pattern at top of the mushroom resembles like a PokéBall. It has a white stem with stubby arms sprouting from it. On its stem is its tiny face, with small black eyes and a mouth with large pink lips.
Foongus appears to be based on a mushroom and a Poké Ball.
Foongus' name may come from fool and fungus. Also, if the names of Foongus and its evolved form, Amoonguss, are put together, it sounds like the phrase "Fungus among us."
Foongus is the fourth Pokémon to resemble a Poké Ball, the others being Voltorb, Electrode, and its evolved form Amoonguss. However, unlike the others, it only has a Poké Ball design on it, instead of being in the shape of one.