Alternate mode: 
Rhinoceros

Galaxy Force name: サイドス (Saidos)

First cartoon appearance: Cybertron episode #11: Deep

Official character text from packaging... 

Once the most feared and powerful warrior on the Jungle Planet, BACKSTOP was long ago beaten and cast out by SCOURGE. Forced to live among weaker beasts, he came to value the equality of all creatures above all else, and now fights against SCOURGE with the other Jungle Planet rebels. He hates the cruel dictator, and dreams often of the day on which he will finally throw down and destroy the evil, three-headed dragon-bot.

Cyber Planet Key Code: stw7
Backstop is an ancient and wise master of martial arts. He may not look like it due to his stocky size and Rhinoceros alt-mode, but deep within this thick-skinned bot lies the beating heart of a master warrior. At one time he was just like Scourge and Leobreaker – quick to anger, full of rage and unable to keep his temper in check. He went on a journey as a young Transformer to find the meaning of life and saw the galaxy – he learned the secrets of martial arts and the teachings of the wise from ancient masters like Banzai-Tron and Bludgeon...upon his return to Jungle Planet, he was a changed Bot. He realized that fighting may be important, but it is what you fight for that makes you a strong warrior.

Profile, Abilities & Weaknesses:  
Will be added/edited as more information about the character becomes available...

STRENGTH: 8
INTELLIGENCE: 6.5
SPEED: 5.5
ENDURANCE: 7
RANK: 5
COURAGE: 9
FIREBLAST: 7
SKILL: 6

Bibliography of significant appearances:

Cybertron episode #

* more to be added later.

Other appearances: Backstop is an original character name and has made no other appearances in the Transformers Universe.

More Toy pix:
robot mode 1b
robot mode 1d
beast mode 2c 

more cartoon pix:
robot mode
robot mode
robot mode
robot mode
robot mode
robot mode
robot mode

beast mode
beast mode
beast mode
beast mode
beast mode