The Transformers franchise was pretty much known for its toys, but many knock-offs have appeared in several world markets since the 1980s. These knock-offs are commonly known as "KO's" in the Transformers fanbase. I'm going to list the knock-offs that I just find cool and appealing. Enjoy!
#10: Convert-A-Bots Cybertron FX-8
One notable knock-off toy line was the Convert-A-Bots, which featured transformable robots with designs that were plagiarized from that of Transformers. Anyways, this is a reproduction of the Sky Garry character, who was given the name "Cybertron FX-8," as if the company that made this didn't want to get slapped with a lawsuit by Hasbro. I've never seen Sky Garry until I saw this image. I think he looks pretty cool, as if he's Transformers' version of the RX-178 Gundam from Japan's Mobile Suit Gundam franchise. This KO was widely available throughout some stores in the United States itself.
#9: G1 Jumbo Machinder Godmaster Transformation Robot from South Korea
South Korea was a country that had an abundance of Transformers KO's. Anyway, this KO version of the G1 Jumbo Machinder looks interesting, and the box artwork kinda shows it, too. This toy came out in 1990, but I'm not sure what company made this toy. KO collectors would love this.
#8: Titanic Bot
A Chinese knock-off company managed to come up with a transformable robot toy that was more related to James Cameron's 1998 classic film Titanic rather than Transformers. All it has is a miniature replica of the HMS Titanic that transforms into a super robot. Impressive, isn't it?
#7: Super Robot Transformable Thomas
I've reviewed this toy on Moviepilot 3 times, but I'm going to add this to the list of Transformers KOs. A company in Singapore somehow managed to make a transformable robot based on the popular British children's series Thomas the Tank Engine. It also had some Voltron or Gundam-type elements to it. It looks packaged in a way to make it look like officially-licensed merchandise, but only if Gullane Entertainment (formerly the Britt Allcroft Company), the company that owns the rights to Thomas & Friends, would do so, but you gotta admit, this is one cool toy!
#6: Roadbot Toyota Land Cruiser from Happy Well
Happy Well is by far the most well-known producer of Transformers knock-off toys. I believe they were based in Hong Kong, and they were brave enough to strike a deal with major store chains like Wal-Mart or CVS Pharmacies to put their toys on sale in those exact stores. They were known for their "Roadbots" series which were based off of actual cars from the 21st century onward. This particular model was based off of the Toyota Land Cruiser. The design on this toy looks cool when it's in its robot form, making it look like something from the 1980s.
#5: Earth Patron Saint
Earth Patron Saint was a Chinese KO that looks like every Transformers/Diaclone character combined into one giant robot. Pretty cool looking, though.
#4: KO Aero from South Korea
This is another KO from South Korea, but was from the 2000s. This looks like something similar to Transformers, but the toy design looks fantastic, at least.
#3: KO Minerva from South Korea
This is another South Korean KO, this time based off of Minerva. Minerva himself looks like an Italian racing car, but he is also a police car. The packaging looks pretty terrific, too.
#2: Alpha Base Robot
Another South Korean KO, and by the way the box art indicates, it could be an interesting KO for Transformers fans to collect, although you could also see some [Power Rangers](movie:1408875)-type characters as well.
#1: Henkei Optimus Prime
Henkei unleashed a KO Optimus Prime that had a pretty fancy paint job (color-wise). This version of Optimus looks more like a Decepticon, but it looks pretty cool. The paint job is beautiful, and the colors look awesome!