Whacka

Whacka appeared in 2000 video game called Paper Mario. Whackas are rare, blue mole-like creatures that first appeared in the Paper Mario series. Their name is derived from the popular arcade game "Whack-a-Mole". Hitting one on the head with a Hammer, Kooper or Koops's shell, Bombette or Bobbery's explosion, or jumping on it makes a Whacka Bump appear. However, if they are attacked eight times, they run away, releasing a few coins.