Slowpoke You can no longer fish from rocks but it's route 4 in general while super rod fishing, using argate city head North while surfing from the rock climb spot it should lead you into route 4
Squirtle need rain for entire event now
Azurill policeman egg or breed Marill/Azumarill with a sea insence from Coral ward before the restoration, , using argate city head North while surfing from the rock climb spot the first patch of grass up the waterfalls has marill/Azumarills
Exploud right now you cannot find in wild
Spiritomb is most definatly in mining rocks
Joltik Upper peridot ward, grass near fountain
Sigilith might be mirage tower and sigiline cave area