OOC: Tom8915, believe me. Tyranitars can learn Ice Beam. Mine, in my Emerald Version, has it. That is proof enough for me. Unless you want more proof...
IC: Though Tyranitar took some damage from the Azumarill's water gun attacks, he was long from out.
"This is getting interesting. Tyranitar, Rain Dance!" I shouted.
Tyranitar roared loudly and suddenly a downpour started. Rain drops splattered around me causing me to get soaked.
"Heh. Although it helps his pokemon for a while, Tyranitar, finish it off with a heavy duty Thunder. GO!" I commanded.
Tyranitar unleashed zigzagging thunderbolts into the air. The Thunder attack followed azumarill and struck it where it was causing intense damage. The azumarill stood on the ground for a bit with a look of exhaustion.
"I suggest you call it back. Any more and it will be badly injured. I'll give this one time to call it back." I said to Tom and told Tyranitar to be cautious.