Popos are recurring enemies in the Legend of Zelda series. Popos are small, almost spherical creatures with red and blue tentacles sprouting from them. They are only able to attack by bumping into Link, and may be defeated in one hit by nearly any of Link's items.
As before, Link first encounters Popos in the Eastern Palace. Popos are aggressive in this game, and now will home in on Link. They appear in two varieties, a blue version and a red version, the latter being the rarer of the two. The red Popos have more HP, guard the Stamina Scroll, and deal much more damage than the blue Popos as they take two Hearts if Link does not wear the Blue Mail.