Pokémon is one of the most iconic anime and video game franchises of all time, and most people are familiar with the design of these popular and lovely creatures. Most Pokémon types tend to follow a specific design, so most players know what to expect from each Pokémon, even if they don't know their type yet.
Source:https://www.cbr.com/grass-pokemon-should-be-different-types-based-on-design/