>>47451830While Rillaboom has a good design, it's pretty much just a gorilla with a drum, and it doesn't stand out as much as the other two. Same goes for Grookey compared to Scorbunny and Sobble. While some would argue that Cinderace and Inteleon are too "character-y," most people gravitate towards those kinds of Pokémon because they have more personality. They're more memorable than "monkey with a stick" so people become more attached to them.