Jumper

Janpa (ジャンハﾟー) are frog creatures that appear in Donkey Kong for the Game Boy. They bedwell the Jungle area and can be seen in stage 4-10.

Janpa wander around by making continuous brief leaps, stopping at irregular times to croak. They also do not aimlessly follow a set direction, making their way of locomotion unique from those of other creatures of the game. If Mario hops on them, Janpa will change their behavior, as they begin to jump vertically and higher than usual. This action allows Mario to reach platforms located high above, which is especially helpful when he carries a key and thus has no possibility to climb ladders. If Mario dismounts from a Janpa, the frog will resume its initial stroll.

Janpa frogs are impossible to pick up. Even though they might be considered allies of Mario in selected situations, they can be knocked out nonetheless if Mario throws any burden he currently carries, such as a key, at them.