You need to be careful here! Specifically, you should explicitly set the value of @ToyName in the proc, otherwise it will retain its previous value if no matching row is found.
That is, if the receiving variable for @ToyName contains 'GI Joe' when the proc is called, it will still have that value if no matching name if found.
Typically you'd want to return NULL if no match was found, so:
Select @ToyName = NULL
Select @ToyName = vToyName from trial where cToyID = @ToyID
Return case when @@rowcount > 0 then 1 else 2 end