Well, in Poke'mon pearl and diamond, Cyrus has Four Poke'mon (srry if you hate spoils): A Gyarados, a Golbat, a Honchcrow, and either a weavile or a Sneasel. I can't remember. I'd use a fighting type Poke'mon, such as Medicham (Or others, depending on taste) to take out the Weavile. for the others, Use a fast electric-type to take them out. I used luxray and Medicham on his Poke'mon. Make sure they're at decent level in the 40's or something, and buy plenty of revives, super potions, and hyper potions for that battle, 'cause it's not gonna be easy.
Well, it wasn't for me, at least. It might also be considerable to bring a rock type or a steel type, just in case. Like Onix or Steelix. I had a Madicham, an Alakazam, a Luxray, Prinplup (It hadn't evoled into empoleon yet -_-'), Onix, and Staravia. It might as well be a team of recommendation. I've been playing these games for a long time. I don't have Poke'mon Platinum, but I'm pretty sure Cyrus has the same poke'mon in that one. I hope this is a good enough answer.
how do you fight cyrus in pokemon soul silver
yes your rival will heal your Pokemon before you fight Cyrus.
If you are looking to complete your Pokedex, then you shouldn't worry, because you will fight Cyrus in the Distortion World, And he will have a weavile.
i beat Cyrus with a torterralv50 houndoomlv45 haunterlv49 crobatv49 gyaradoslv43 and a lucario lv50
you fight Cyrus at stone pillar at the top of mt. corronet (or whatever it is) ~wanna trade?~ ID 63797
how do you fight cyrus in pokemon soul silver
in team galactic hide out spear piller
In Pokemon Platinum, you don't battle Cyrus at Spear Pillar. Instead, you fight him in the Distortion World. After beating him, Cynthia heals your Pokemon and then you battle Giratina.
yes your rival will heal your Pokemon before you fight Cyrus.
the second time, Cyrus is in mt coronet. he is somewhere call the Spear Pillar with the other galactic bosses. when you talk to them, they want to battle you and then your friend will come and fight with you. when you beat them you will also need to fight Cyrus. behind them is dialga
water,fire and grass
If you are looking to complete your Pokedex, then you shouldn't worry, because you will fight Cyrus in the Distortion World, And he will have a weavile.
Arceus or Spiritomb. It depends on who your going to fight.
i beat Cyrus with a torterralv50 houndoomlv45 haunterlv49 crobatv49 gyaradoslv43 and a lucario lv50
Cyrus is from Pokemon D/P/Pl. He is the leader of Team Galactic.
A water Pokemon probably the water starter Mudkip
Maybe it could be Arceus,not Cyrus.