Rilldo

Rilldo is Dr. Myuu's general and the commander of planet M-2. General Rilldo's first form is used for hiding his true power. His true abilities lie in his transformations. Rilldo can transform twice each time slowly showing off his true power. In his second form, he is just as powerful as Goku's Super Saiyan form in Dragon Ball GT. In his final form, he is a lot stronger and his full power is shown.
General Rilldo appears as a machine mutant created by Dr. Myuu, who appears to be the leader of Myuu's Machine Mutant armies. When Goku, Pan, and Trunks arrive on the planet M-2 with Giru, Rilldo sends the Sigma Force to capture them.
The Sigma Force were defeated by Goku, leaving Rilldo to take care of the two by himself. Using his Metal Breath that turns things into metal, Rilldo captures Trunks, but is still defeated by Goku. After combining with the remaining scraps of the Mega Cannon Sigma, Rilldo powers up to his Meta Rilldo form, forcing Goku to transform into a Super Saiyan to fight him properly. As Goku begins to gain the upper hand, Rilldo transforms again to allow him to fuse with any metal on the planet and make him nearly invincible.
While the trio try to leave the planet M-2, Rilldo stops them by grabbing hold of the Grand Tour spaceship. Trunks tries to reason with him, saying he was nothing but a pawn in Dr. Myuu's games, just an inferior being that would be shut down once his plans with the other creation Baby were complete. Rilldo refuses to listen, however, the three fire a combined Kamehameha attack, that easily kills the un-transformed Rilldo.

It is later revealed that Rilldo was in fact under control of Baby.
General Rilldo, along with the other villains, escape from Hell, thanks to Myuu and Dr. Gero. He is first seen chasing Pan and Mr. Satan, only for them to be saved by Gohan. The two end up fighting, with Rilldo easily gaining the upper hand. He is even successful in encasing Gohan's arm and leg in metal. He nearly kills Gohan, but is killed by a sneak attack from Majuub.

 Rilldo forms

1.General Rilldo

2. Meta Rilldo

3. Hyper Meta Rilldo

Information from:
http://dragonball.wikia.com/
Information picture :
http://tekilazo.deviantart.com/