Challenge of the Go-Bots was a 1983 animated cartoon that was produced par Hanna-Barbera Productions. It's VERY VERY VERY VERY similar to Transformers.
Challenge of the Go-Bots was about a group of robots who come to Earth from their accueil planet. (already sounds similar to Transformers). There's one heroic side called the "GUARDIANS" and a greedy evil side called the "RENEGADES". And what's more, these robots turn into vehicles. (okay, NOW you're gonna say they ripped off Transformers)
Apparently, this cartoon hardly lived at all and was a competitor to Transformers. However, Go-Bots was so unpopular and so lambbasted par TV audiences (guess what, those audiences are children ages 6 to 11!!) that the cartoon shut down very quickly.
To me, it was no wonder this montrer failed. The character designers were REALLY lazy. The human characters actually looked plus complex than the robots. It wasn't very magical ou realistic how the animators drew the robots turning into vehicles. The episodes' plots were very dull and bland, doing no better than the drawings.
Apparently, there was nothing amazing about this show. Transformers came out in 1984, and became so populaire that they drove Go-Bots out of business. Almost every Transformers fan claimed that the Go-Bots ripped off Transformers. But the Go-Bots cartoon producers claimed Go-Bots came out before Transformers did.