Meep

The Meeps were a species of furry creatures, more dangerous than they appeared.

Biology
Meeps were spherical creatures with large ears, a short nose and almond-shaped eyes. Their dense fur concealed a pouch and their blood was green. (DWM: The Star Beast) They had white fur and pink feet and hands. (DWY: Star Beast II, EDA: Placebo Effect)

Technology
Meeps used neutron drive star cruisers to travel, which used star jumps to travel vast distances. These ships produced Black Sun radiation, which could control individuals. (DWM: The Star Beast) They also used laser pistols which had no stun settings. The pistols could be made to discharge constantly and harmlessly, causing them to be become less powerful over time. (BFA: The Ratings War)

History
Originally the Meeps were a highly advanced, peaceful race, envied for their happiness. The race was mutated by the rays of a Black Sun, which turned them into conquest hungry, planet-grabbing killers. (DWM: The Star Beast) Eventually, they returned to their peaceful nature, though they were still a cunning and resourceful species, taking advantage of their seemingly harmless nature. (EDA: Placebo Effect)

A drunken Meep on Maruthea approached the Seventh Doctor and his future incarnation to claim some kind of bounty. The Freefall Warriors attacked him and everyone began fighting each other. (DWM: Party Animals)

At some point before the 26th century members of the Slitheen family impersonated Meeps. (NSA: The Monsters Inside)

In the 37th century, a Meep was at the art gallery of Oriel. (DWM: Art Attack)

During the 40th century, the Meeps successfully petitioned the Galactic Federation to stop the production of stuffed Meep toys, finding them offensive. (EDA: Placebo Effect)

In the Olympics of 3999, several Meeps were participating, including one who competed against Kyle Dale in the discus throw. (EDA: Placebo Effect)

What colour is a Meep?

 * The first reprint of a Meep story was in Marvel's US title Doctor Who. Andy Yanchus and the cover colourist George Roussos coloured the Meeps blue and the Wrarth Warriors green. David Leach in Marvel's UK title The Incomplete Death's Head and Charlie Kirchoff in IDW Publishing's Doctor Who Classics used the same colours in the reprinted comics for Meeps and Wrarth Warriors.
 * The first UK reprint and the first comic originally printed in colour were both done by Paul Vyse, who made the Meeps white and the Wrarth Warriors brown. The novel Placebo Effect also describes Meeps in Vyse's colours.
 * To make it more complicated, a mock-interview from DWM 419 depicts Beep, thus far officially white, as purple.