No. The "Ascension" Zombies map (part of the "First Strike" DLC pack) is not available on the Wii version of Call of Duty: Black Ops.
Wii Black Ops players are limited to the five on-disc Zombies maps: Kino der Toten, "Five", Dead Ops Arcade, Shi No Numa (unlocked), Der Riese (unlocked). No First Strike, Escalation, Annihilation, or Rezurrection content ever arrived.