Shock Wave is a pure Electric-type move and does not have any additional effects, such as paralysis.
Moves that can cause paralysis in Pokemon SoulSilver include:
* Thunder Wave (Electric)
* Thunderbolt (Electric)
* Thunder (Electric)
* T-Bolt (Electric)
* Lick (Ghost/Poison)
* Thunder Fang (Electric/Dark)
Remember that these moves have a chance to inflict paralysis, but they are not guaranteed to do so.