RBY Yeaaa Rhydon is great in RBY. It hard counters Zapdos and Zapdos is the reason why a Rock/Ground is needed. Jorgen did a great comparison of Golem and Rhydon here. Rhydon also did a pretty good job walling Snorlax too. Rhydon is also the reason why I run Surf on both Snorlax and my own Rhydon as bad as that might be lol >.> I just like to bait it out and Surf the Rhydon so that Zapdos can para everything and hopefully pave way for a sweep. It's an entirely solid Pokemon and Exeggutor comes in to force it out, which then lets Zapdos switch in, which then also attracts Rhydon. LOL. Rhydon forces switches quite well if you can play around with it. There are no Spikes or anything in RBY but the gradual damage you rack up is quite useful and yeaaa Body Slam para. Rhydon also doesn't mind getting Stun Spored since it's slow anyway. RBY is probably Rhydon's best generation. DPP I never knew it never had an analysis .______. Neither do I remember seeing it being used in UU. It's in NFE tier lol o.o Rock / Ground is no longer a good typing as it means that Rhydon is weak to Water, Grass, Ice, Fighting, Steel, Ground, all common types. It no longer has a place in UU despite its base 130 Attack. Base 40 Speed is also pretty terrible, even with Rock Polish. Even Aggron does this better. I have no idea how a Choice Band set would work well there though, but I doubt it'll be really good with solid checks to it such as Hitmontop, Slowbro etc being common in UU. Registeel and Steelix are better options for supporting the team with Stealth Rock etc too. Yea Rhydon is pretty non-existent in DPP I guess. I don't know how well it fares in DPP NU though.