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Marimokkori (まりもっこり) is a character popularized in Hokkaidō, Japan. Much like the Tamagotchi, the name "Marimokkori" is a portmanteau: marimo is the word for the green algae clusters that grow in some of Hokkaidō's lakes, while mokkori, literally "bulge", is a Japanese slang term for an erection.
Marimokkori's fame comes through merchandising, with a number of various souvenirs being sold in Hokkaidō and throughout Japan.