Many people have asked how they can pass Silver Trench. However, the answer is very simple. First of all, go recruit Raikou, Entei, Suicune, Articuno and Moltres (Zapdos is needed too in order to go). Then pick two of three dogs and one of three birds. Raikou or Entei should be the Team Leader, Suicune and Articuno or Moltres the followers. Learn Articuno Powder Snow or Moltres Heat Wave. Get the two dogs and the bird to a high level (70 and up). When you find Monster Houses enable the attack Heat Wave. It is easy. At floor 98 say farewell to Articuno or Moltres and recruit Lugia!
ps. Raikou or Entei must hold tight belt. Here is a code:
??1N W4Y? ?R?3
PM?Y 64?6 (...)??W

Thank you. But we don't need a copy-paste guide.