Robotech is an Americanized cartoon show called Macross
, produced by Studio Nu in Japan in 1985. The original series was considered too short for station owners in America to syndicate, and so two bogus shows where added by Harmony Gold, and the original storyline was massively altered to add to the deception. Some examples of these changes are: The size of the SDF-1, (via spoken word), certain characters hair color and style radically change over time (Dana Sterling) the fate of both of the shows main characters was also altered.
The first 40 or so episodes of Robotech are worth viewing though, and are available at most movie rental stores, and on Robotech.com. Macross can also be purchased, but as of now, there are no English re-voiced versions.
Robotech/Macross is considerd one of the greatest Anime shows of all time.