Related to the above point about the companion system and relationship mechanic with human characters, the main series Pokémon games do not have any option for the player to pursue a romance with another character. The closest a main series game attempted a romance arc for the player character is Omega Ruby and Alpha Sapphire, where the protagonist and their neighbour rival are implied to become a couple in the post-game story by going on a date, as well as Black 2 and White 2, where the protagonist can pursue a subplot with a different-gender NPC who eventually develops a crush on the them.
+Related to the above point about the companion system and relationship mechanic with human characters, the main series Pokémon games do not have any option for the player to pursue a romance with another character. The closest a main series game attempted a romance arc for the player character is Omega Ruby and Alpha Sapphire, where the protagonist and their neighbour rival are implied to become a couple in the post-game story by going on a date, as well as Black 2 and White 2, where the protagonist can pursue an optional subplot with a different-gender NPC who eventually develops a crush on the them.
Cassette Beasts, on the other hand, as an addition to its companion system and relationship mechanic, provides players the option to pursue a romance with one of their human companions after raising their relationship level to 5, the highest without romance, with explicitly romantic dialogue and scenes.