Dokimon:Quest is a 2nd gen Pokemon-inspired game (think Pokemon gold, silver, and crystal), it has the same visual style as those games.
It differs from the gen 2 Pokemon games in that Dokimon:Quest has a lot more going on with the game mechanics, quality-of-life features, and the story being darker than what a person would experience in a conventional Pokemon game. Being a monster taming game it also has a lot of unique and cool monster designs to find and look out for throughout the game.