>>55238408>ArcheopsPeople only complain about Archeops's 3D model because of how the Pokemon is always flying in battles. Thankfully this isn't the case in Camp or when following the player (has an actual walking animation).
If it was in Scarlet & Violet then Archeops would have more than likely stood on its two feet in battles like a few other avian Pokemon do (and Tropius) where flying isn't required. Obviously there are exceptions like Dragonite and Mandibuzz which are always flying in battles.