>>50831415Rhydon is an ungodly beast in the first two gens because Rock was actually pretty good back then - Grass was largely a novelty and good Fighting attacks literally just didn't exist so Water and Ice were its only real relevant weaknesses, while on the other hand Normal was an incredibly valuable resist to have given the number of strong Normal types. On top of the defensive utility, Rhydon also just hits fucking hard with 130 attack and stab Earthquake/Rock Slide.
Jynx is the original fast Ice type (yeah, 95 base was once considered fast) and Ice/Psychic is a fantastic STAB combination even today, and Lovely Kiss is a great status move for the small handful of Pokemon it can't threaten with dual stabs. It's basically the Weavile of Gen 1/2/3.
Arcanine isn't actually any good in old gens (Fire types in general just suck) but in newer gens its access to Intimidate, Morning Sun, and Will-O-Wisp give it a pretty unique niche as a defensive Fire type. Still not great but pretty cool to use.