Given unlimited time, money, & storage, the lion kingdom's favorite mecha from the series was the alpha fighter & the cyclone in season 3.  

https://www.amazon.com/Toynami-Robotech-New-Generation-Beta/dp/B004D5R3RG

There are a few Robotech toys still being sold, manely from the Macross series.  There's only 1 alpha fighter, for a lot of money.  They're of varying quality & not animatronic.  The TV show was subsidized by selling toys, so season 3 obviously flopped for them to be selling no toys for it.  Something that transformed autonomously in front of your eyes would be a hit.  Not sure it could transform & walk, but it definitely couldn't fly.

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7 months after the note,

someone actually produced an animatronic transformers toy, for $700.  It's not very faithful to the fine details, but it actually transforms the way it did in the cartoon & looks roughly like optimus prime.  It has fairly biomorphic movement in humanoid mode & actually drives in truck mode, though there was no demo of it turning.  It must have taken quite a bit of miniaturization to cram all those servos in.  Helas, it's a lot more functional as a truck than an airplane.  Robotech never had any transforming trucks.  Its only wheeled transformer was the motorcycle.

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Another iteration in the animatronic toy line emerged.  This one was $1400.  The mane points they were selling were that it walked on a different pair of legs in each state, it followed the actual transformation depicted in the cartoon, it balanced itself with realtime feedback.  There's some element of smoke & mirrors.  They can't articulate the paws like the original robosapien.  They can't replicate every toy from every cartoon.  Some are more attainable in reality than others.

They emphasize the automatic programmability.  What lions have found to be the most entertaining part of a toy is giving it just enough autonomy so a lion can easily use it as an extension of his body, but not making it fully automated.  Calling any toy entertaining is a stretch.