This is another example for a trio core, its reasoning are as follows: “zapdos, mega mawile and politoed are both a perfect example for covering up each other’s types very well. Apart from that politoed with its drizzle ability sets up the rain-mode or the weather eventually becomes rainy, and zapdos gets the move thunder which has it accuracy boosted up to 100% with a BP of 120 does tremendous amount of damage, rain-mode lessens the power of all fire type moves by 50%, mega – mawile lacks a bit in sp.def and is weak to fire (usually a specially offensive type) this potentially adds to its bulk”. Hope these examples were enough.
Lets just name this a ‘trick room’ lead. You do see if in double this might be the simplest yet effective lead on the competitive scene. This lead works like this: scrafty on the first turn out uses the move fake out, in order to ensure that only one of its opponents can attack. Scrafty potentially by making this move ensures cresselia to set up the move trick room, accordingly which the speed movement is reversed. After it is reversed scrafty and cresselia are both very slow Pokémons, which would move first, scrafty would launch head on attacks whereas cress can do other stuff like heal pulse, helping hand or even attack to OHKO opponents.
This would be simply the most common team in recent years of VGC and still does rages on. Its functioning is like the following: politoed has the access to drizzle ability ensuring to make It rain when it comes out of its poke ball in its matches, by doing this so; it doubles ludiculo’s speed. This happens because the ludiculo always possesses the swift swim ability. After this has happened it can launch head on water type attacks whose power would be increases by 50%, thanks to the rain.