Doublade is only found as a Honedge.
- Honedge can be found on Route 6 (below Parfum Palace)
Klefki is found in Routes 15, 16 and the Lost Hotel.
Scyther can be found on Route 21.
Banette can be found in the Pokemon Village on Thursdays.
(Shuppet is only obtainable via breeding)
Hawlucha can be found on Route 10.
Pangoro is only found as a Pancham.
- Pancham is found on Route 5.
Vanillish is only found as a Vanillite
- Vanillite is found in the Frost Cavern.
Clefairy can be found in the Friend Safari.
Houndour is found in Route 10, but is version-exclusive to Pokemon X.
Pikachu can be found in Santalune Forest.
Seviper can be found in Route 8, but is easier to find in Pokemon Y.
Pelliper can only be found as a Wingull.
- Wingull can be found in Routes 8, 12 and Azure Bay.
Aron and Larvitar can be found in Terminus Cave, but are version-exclusive to Pokemon X and Y, respectively.
Bibarel can be found on Route 22.
Goldeen can be found on Route 3 and Route 22 by using the Good Rod.
Basculin can be found in Route 15, 16, 21 and the Pokemon Village using the Good Rod or Super Rod, depending on where. There is a good chance that Blue-Striped Basculin can be found more often in only one version, but I couldn't find which one. Like in Gen V, both Red and Blue Basculin can still be found in the game.
Wigglytuff can only be obtained as a Jigglypuff.
- Jigglypuff can be found in Route 20 and the Pokemon Village.
Pyroar can be found in the Friend Safari, however Litleo can be found in Route 22.
Hope I helped. :)