Robotman
Robotman was released in 1975 as a hybrid toy line that would link Microman world with that of the Henshin Cyborg. This linkage series for Microman and Henshin Cyborg was called Victory Series (the reason behind "SV" letters on Robotman and Biotron pelvic). Robotman was a 14" tall fully motorized robot with clear chest cockpit to hold a Microman figure (which was quite revolutionary at the time). Robotman had caterpillar track on his back and able to convert into a tank like vehicle for Microman. Takara also produced two add on sets - Drill Set & Dozer Set that would convert Robotman into a Mole Tank or a Bull Dozer. (Early version of Robotman also came with card board cut-out versions of the Drill and Dozer attachments.)
When Mego licensed Microman toys in 1976, Robotman was released as part of Micronauts toy line called Biotron. The early version of Biotron was simply repackage of Takara Robotman in Mego Micronauts box. Later version would came from Mego factory in Hong Kong using new mold (copied from Takara's Robotman mold). The later version of Biotron produced in Hong Kong had a darker tint cockpit, darker red color for the chest and much brighter blue color legs and back part. (See sidebar)
Robotman was one of major staying piece in Original Microman toys line. The toy was made immensely popular by the manga (comic) because the lead character, young boy Akira, piloted Robotman as his personal mecha in the fight against the Acroyears. Robotman would undergone a few transformations by the time Microman line reached its end point in 1980. In 1977, Takara released upgraded Robotman called Robotman2. In 1980, the last year of the original Microman line, Robotman would return in his ultimate incarnation as Robotman God Fighter.
Mego later released a re-color version of Biotron with new head design as Micronauts Phobos. After Mego demised in early 1980's, Biotron toy was released by Mego's successor as The Inter-Changeables - Cosmobot. Cosmobot was given red and yellow color scheme. (Most of the toys from the first series of The Inter-Changeables came in this yellow and red color scheme). The second series of The Interchangeables, Cosmobot was given color scheme but thus far no one has been able to locate an actual sample of this toy.
(See Also - Robotman Gakeen, Robotman 2, Robotman God Fighter and Micronauts Phobos & The Inter-Changeables Cosmobot)
Takara Robotman Series
Robotman series was originally plan as the third toy line in Takara Super Victory series. The Victory series would included toys from both the Henshin Cyborg and Microman line with Robotman as the series that would bridged the two series together and form the big all encompassing toys series. However, Henshin Cyborg line was canceled in 1976 and Robotman series was absorbed into Microman line-up and became a permanent part of Microman series. Takara released several variants of Robotman toys including this off beat Mechadon version.
Robotman was and is one of the most iconic and beloved bots in the Microworld, so it comes as no suprise that a multitude of versions sprung up in the ensuing years.
Takara later produced Robotman 2 for the Police Keeper line, and the impressive God Fighter for the 1980 series
Additionally, Takara added an additonal 3 versions (not including the insanely rare all chrome Hyperdrive exclusive), those being the straight reissue, the Crystal Mode version, and my personal favoirte, the SAS Robotman for the Reissue line starting in 1999.
Besides the full size versions, there were the three Mini Robotmen colorways from the 1976 Spy Magician campaign, a plethora of vintage and reissue vinyl and gashopon variations and plenty of ephemera featuring our beloved mech.
As mentioned earlier in the page, Mego also produced their version of Biotron and later the two-faced Phobos, and Hour Toy produced Cosmobot for it's interchangeables line.
Looking for more information on this tribute figure led me to a discussion from someone who had researched the origins of the Robotman design and they found this patent link which featured the below image of the submitted design. Here is the link if you want to see more:

Packaging
Robotman come package in Henshin Cyborg style box, actually the early package had only Victory Series shield logo which was later removed and replaced with Microman Command logo when Takara canceled Henshin Cyborg line in 1976.


Packaging
Here are some views of the packaging and contents of the earlier Victory version of Robotman.


Packaging
Additonal content shots for the Victory version. Note the difference in poster and insert art




Configurations
Back view showing the ever splitting treads.

Robotman and Biotron was fully motorized. The toy can be convert into a tank mode.


Variations

Microman Robotman and early version of Biotron came with crystal clear cockpit while the later Mego Micronauts Biotron came with smoke clear variety.

Beside the cockpit, Mego also changed the colors slightly. The blue was much brighter while the red was much darker. Above is the comparison between later Biotron feet color and Microman Robotman feet color. Note the change from the sea-blue to brighter blue color.
Variations
These images and information come from the site https://www5e.biglobe.ne.jp/ ~mikuro/sab1-2.htm, and detail the differences in the internal drive transmission in the legs and torso.
Robot Man Change in Drive Transmission
The top image an early type, and the bearings in the torso are made of resin, which can crack and make it difficult to transmit power. Therefore, the lower left protrusion has been added to improve it.




Acessories

Robotman toy came with cardboard paper cut-outs that can be used as accessories for Robotman. (Picture courtesy of Ray M. of Micro ES)
Sold separately was a set of accessories that have become highly coveted - the Drill Tank Set and Bull Dozer Set


Acessories
Robotman Checklist
Microman Series
- • Robotman (1975)
- • Dozer Set (1975)
- • Drill Tank Set (1975)
- • Robotman Gakeen (1976)
- • Robotman Mechadon (1976)
- • Robotman 2 (1978)
- • Robotman God Fighter (1980)
Micronauts Series
- • Micronauts Biotron (1977)
- • Micronauts Phobos (1978)
- • Interchangeable Cosmobot (1980)
Replica Series
- • Replica Robotman (2001)
- • Clear Mode Robotman (2001)
- • SAS Robotman (2001)
- • Hyper Drive All Chrome Exclusive (200?)