What items are needed to find Kyogre and Groudon in Pokemon silver?

Kyogre and Groudon are not available in Pokemon Silver. They were introduced in Pokemon Ruby and Sapphire, which are the third generation games.

In Pokemon Silver, you can find other legendary Pokemon like:

* Articuno, Zapdos, and Moltres: These legendary birds can be found after defeating the Elite Four and obtaining the National Pokedex.

* Raikou, Entei, and Suicune: These legendary beasts can be found roaming the Johto region after defeating the Elite Four.

* Lugia: You can find Lugia in the Whirl Islands after obtaining the Silver Wing.

If you're looking for Kyogre and Groudon, you'll need to play Pokemon Ruby or Sapphire or a later generation game that includes them.