How did you get a Latios in Pokemon Silver? It isn't available in Pokemon Silver, because Pokemon Sapphire, Ruby, and Emerald wasn't out that then. Besides Latios doesn't evolve.
Tauros does not have any evolutions and will not evolve at any level in Pokemon Soul Silver.
Evolve it from larvitar at level 30 to evolve it into pupitar then evolve it into tyranitar at level 55
He doesn"t evolve!
wha?
Level 45
You have to trade him
1o
At level 23
level 36
level 31
it evolves at level 30
Level 25.