We start the trio of Kanto starters in a Japanese prints style with Venusaur! (normal, we follow the order of the Pokédex)

The Japanese inspirations here are less advanced than usual, but note that Venusaur still seems to have some inspiration from the yōkai Ōgama 大蝦蟇 (lit. "giant toad"). When a Japanese toad reaches 1000 years old, it is said to transform into an Ōgama. It grows more and more over the years, until it reaches gargantuan proportions (a particularity that fits well with the family, in my mind). Also its breath is rainbow-colored (a particularity that I wanted to show, but via its flower here).

Another interesting fact with Venusaur's family is the puns for their names in Japanese.
Bulbasaur is called fushigidane フシギダネ which has a double meaning: we have both the sentence "Fushigi da, ne?" (lit. "it's weird, isn't it?") and the fushigi dane word 不思議種 which literally means "strange seed".
Ivysaur, in the same logic, is called fushigisou フシギソウ, which means "Indeed, it's weird" (we therefore answer the question posed here with Bulbasaur!), but also we still have a literal meaning with fushigi sou 不思議 草 ( "strange grass").
Venusaur is called fushigibana フシギバナ and comes again from fushigi 不思議 (lit. "strange") and hana 花 (lit. "flower")

You see the genius level for their names in Japanese. It is part for me of one of the families with the greatest names of the whole franchise!