Jumpman is Mario's original name, who first appeared in Donkey Kong, an arcade game developed back in 1981. He should be back as a playable character in SSB4, since he is the one who made Mario famous.
Side B: Cape
Up B: Super Jump Punch
Down B: Hammer
Final Smash: Demolisher, will create a giant crater in the middle of the stage, risking loss of lives to opponents. References to how Jumpman defeated Donkey Kong in 50m.