Robonyan 28 is similar to Robonyan with a large mechanical body build. He has now long cat ears with a studed metallic ring on the left instead of short ears. Two missile cannons were present on the mid area next to his head with the shoulders being black and round, with the number "28" imprinted in gold. His tail tips are now drills instead of red flames. The rim wrapped around around Robonyan 28 are actually yellow-white missiles. Lastly, a huge metal rim surrounds a red circle on the chest area.
Abilities and Powers
When being recruited (Yo-kai Watch: Wibble Wobble/PuniPuni): "What. What is this power... I want to know your secret ability!" (な...なんというパワー...きみの性能のヒミツを知りたい!)
After two failed battles against Inaho Misora, as both Robonyan and Robonyan F, Robonyan assumes this form for their third battle. After this proves a failure, he becomes Ultimate Robonyan.
Robonyan 28 is parody of Mitsuteru Yokoyama's Tetsujin 28, 1956 comic from the creator of Giant Robo. The 1963 animated adaptation was released in America as Gigantor, and is the first Japanese animation in history to feature a giant robot.