If you go into the Dragon's Den and surf around, or use a Good Rod, you might get one.
In johto!
dratini is in the swamp safari zone ( so iv've heard)
Try the game Soul silver then get to the 8th badge it has stuff about dratini (what a bizzare question)
Trade
10,455 steps
Yes because i have one and it knows surf
The guy in the dragon shrine will give you one eventually.
@ lvl 30 into dragonair and lvl 55 into dragonite
You can surf in the Dragon's Den, or you can answer the Clair's grandfather's questions and come back later with an empty slot in your party. He will then give you a Dratini (the Dratini will know ExtremeSpeed if you answer all his questions correctly.)
Level 11 or 20 but it evolves on lv. 30 ^_^
It evolves at level 30 in dragonair and again at level 55 in to dragonite
Dratini in Pokemon Silver can be found in the Dragon's Den or on Route 45.