100
There is are no certain Pokemon needed to defeat the elite four. Just use your strongest Pokemon.
In Pokemon League
kill the elite 4 noob
-mongmong908
You can find out how many times you have beaten the Elite Four in Pokemon Diamond by checking your PC in the game.
defeat the elite four
it is the elite four
The champion in the Elite Four.
nation pokedex
The Elite Fours Pokemon are all in their 50s. The Champion at the end of the Elite Four has 60s though.
SPRITOMB you can see it in the elite four.Champion Cynthia has it.It is her first pokemon.
the same