Threat List
Green mean not a trouble at all
Orange mean can cause minor or medium trouble
Red mean MAJOR problem
Venusaur: is an easy switch to Arcanine
Arcanine:Handled by Rhyperior,Milotic
Raikou: Venusaur could handle this to an extent,otherwise trick it a scarf and go to Rhyperior on predicted T-Bolt
Milotic:Handled by Venusaur because most doesn't carry Ice Beam,Rhyperior will kill the switch-in after 1 layer of spikes and stealth rock with EQ
Uxie:Not a trouble at all,do I need to explain this?
Registeel:Arcanine,or killed by Rhyperior (OHKO!)
Ambipom:Rhyperior because he is SOLID,or else Arcanine
Froslass: T-wave the lead with Uxie and then my own froslass setting up
Rhyperior:Wow my main weapon turn to be one of my nemesis,you probably see this coming,I have no safe switch except Milotic,but Venusaur can also switch-in if something is down
Azumarril:Venusaur or Milotic
Donphan: Venusaur or Froslass own this
Mismagius:A bit of a problem,but Rock Blast prove to be valuabe here.
Sceptile:Arcanine,or Froslass
Hitmontop:walled by Froslass except if it packs Bullet Punch,or Arcanine and Venusaur
Umbreon:This can't do much in the face of Rhyperior,or Milotic haze curse variant
Moltres:This thing is a beast,my check is only Milotic (a nice one though,only nice!).Usually Arcanine weaken it enough so I can finish with priority
Alakazam:Now with the departure of Spiritomb,this thing can be a pain,but still can be played around
Spiritomb:OHKO from Rhyperior
Clefable:outspeed,then see above
Swellow:Rhyperior,or Arcanine
Altaria:Rhyperior can handle offensive ones even after +1,or Froslass for the defensive one
Feraligatr:Venusaur or Milotic,sometimes they think they smart enough to set-up on Rhyperior only to be drilled (pun intended)by Rhyperior
Blastoise:Froslass set-up,or Venusaur
Dugtrio:Fun-Fact,Rhyperior is only 2HKOed by EQ,and can deliver EQ in return,it trap Froslass and Arcanine though which is suck (and weakened Venusaur)
Claydol:Never see this anymore,but handled by Milotic or Froslass reliably
Steelix:the great thing is that even without entry hazard,Rhyperior KO with EQ on max hp/no defense variant,or Milotic
Slowbro:with enough entry hazard,Rhyperior will KO this with Megahorn,Milotic can handle this
Kabutops:In the rain DEADLY,outside that it is a green threat
Blaziken:Milotic beat handily,or Arcanine,Rhyperior survive one Superpower and KO
Rotom:not really a trouble with it's poor defence,handled depend on the set
Chansey:Rhyperior FTW!or any of my sweepers (or Uxie trick it with scarf)
Toxicroak:Arcanine,or Venusaur
Regirock:Even with 200 base Defense it can be OHKOed by Rhyperior Earthquake with enough entry hazard,or else Milotic
Houdoom:Milotic or Arcanine
Ludicolo:Rain variant can only be played around
Drapion:OHKOed by Rhyperior EQ,and not threaten any of my pokes
Torterra:RP is just bastard,I usually played it around though and worn it down with LO damage
Scyther:Arcanine rocks this stuff
Omastar:Venusaur,in the rain however,dangerous
Absol:Arcanine can handle this
Lanturn:thank God it's rare,can cause some trouble,usually just trick it with scarf
Cloyster:Froslass,or Rhyperior or Milotic
Qwilfish:Rain can only be played around
Aggron:Rhyperior,or Milotic,not face it yet though
Hariyama:Uxie beat lead variant,otherwise Arcanine
Weezing:both Froslass and Milotic can handle this given it poor special defence.
Hitmonlee:Played around,Milotic and Arcanine can handle though
Nidoking:Rhyperior or Milotic,gotta watch out for Poison Point
Leafeon:I remember getting destroyed by this before I use arcanine,not a problem anymore though.
Credit to Pastel for making the list!