Jynx

Jynx carves out a niche in RBY 1v1 thanks to its STAB move combination, unique resistances, and immunity to freeze. Jynx can defeat important threats like Chansey and Articuno and still attempt to freeze other threats like Starmie, Alakazam, and Snorlax, which would usually counter it. What holds Jynx back are its low HP and Defense stats, which prevent it from survivng longer on the field without its trademark move, Lovely Kiss. Jynx's attacks are quite good in certain matchups, but other Psychic-type Pokemon have better traits, like Alakazam's great Speed, Starmie's outstanding bulk, and Exeggutor's combination of Leech Seed and Toxic, leaving Jynx as a niche but viable Pokemon in the metagame.