The Villains
#25, #27, and #28
3 lost creations of Dr. Gero. Began the unfreezing process after Buu's defeat and the Earth's resurrection. It did that because the massive energy production of bringing back the earth caused a massive disruption in the machine's working. After 3 years of modifing and unfreezing, 4 androids arose. #26 was killed by #27 merely because #26 had on a yellow shirt.
Most powerful move: Hell Ball (A variation on Freeza's Deathball Attack)
Tempo
Tempo is a Namek warrior. He's Piccolo's arch-rival. They're almost equal as far as strength, speed, and ki powers... but Tempo is more crafty and intelligent. What really gets to Piccolo, however, is that Tempo got to his current state by only training. Piccolo has merged with other nameks to get as strong as he is.
Most powerful move: All pretty even.
Polar
Polar, possibly the greatest warrior of all time. Polar, formerly known as Junken, used to live on Planet Heider. King Cold, Freezer, Kooler, and their army destroyed it much like Planet Vegeta, however, Junken escaped. Junken was not the type to silently plot revenge, though, and immediately broke into King Cold and his lackie's ship. He easily disposed of the guards on the ship, and taught King Cold a thing or two about messing with him. King Cold, however, sent for his two sons to come and take care of Junken. Junken could take on King Cold one on one, but two people with about the same amount of power at the same time was a bit overwhelming. He fought valiantly for a while, however, and nearly won. But, King Cold stepped in at the end of the fight and ended it quickly. Even though they were nearly defeated, they admired his skill. They took him to the operating room and converted his body to that of a Cold family member. Purple and white, with the tail and horns. They dubbed him the name Polar. Polar was far more powerful than them however, and got 7 forms instead of 4 or 5.
Most powerful form: Form 7, full power (Polar turns Gold and Purple. Can easily break normal men into billions of trillions of pieces and rearrange them however he wants just by twitching his index finger)