Generally Frequent Goemon Factsさんのイラストまとめ

On this topic of Japanese folkore legends, in the MSX2 version of Ganbare Goemon: Karakuri Dochu! the 2nd player would play as Nezumi Kozo (would later become Ebisumaru in GG2 FC). Nezumi Kozo (1797-1831) was a Japanese thief similar to Ishikawa Goemon.

Yae is the only member of the team that isn't based on a Japanese folkloric hero.

Sasuke's design is based on the karakuri puppet. Karakuri puppets are traditional Japanese mechanized puppets made from the 17th century to the 19th century. Their exteriors are made of porcelain while the interior is made of wood and metal.

Goemon's Short Fuse/Sudden Impact jutsu is a reference to Goku's "Super Saiyan" transformation from Dragon Ball Z.

Golem, the Atrocious Treasure Ship from Ganbare Goemon 3 is based on the Brain Golem from Salamander.

The 2nd stage boss in Mr. Goemon is based on the Actor Otani Oniji III as the Yakko Edobei ukiyo-e print by Sharaku.

The stagehand enemies from Ganbare Goemon 3 are based on the ningyozukai (puppeteers) in a traditional bunraku performance. Although, the enemies dolls look more like action figures.

The title screen for Legend of the Mystical Ninja is based on a painting by iconic ukiyo-e artist Hokusai. It's called Asakusa Hongan-ji Temple in the Eastern Capital.

@EvilBasementCat How can people hate this gaudy, clockwork robot that's not only a successful actor, but also managed to get a girlfriend?

One of the retro games you can play in Persona 5 is called "Gambla Goemon". It's a dice gambling minigame where you can bet either even or odd, depending on what you roll. Completing both levels increases your charm.