They don't. In Pokémon Yellow version, the Pikachu follows you.
Pikachu does not walk with its trainer in the blue version. Only in the yellow version does it walk by its trainer.
Some Pokemon are able to walk in amiti square, but in platinum even starters and there evolved forms can walk with you.
Syther is not available in Blue version and must be transferred from Red version.
no
not possible
walk there
walk
No, but you can in yellow
The starter pokemon for Pokemon Blue version are: Bulbasaur, Charmander, and Squirtle.
Just walk, walk and walk again 'til the egg hatch.
just walk out
Ekans cannot be caught in Pokemon Blue version. You need to trade one from Pokemon Red. Similarly, Sandshrew is exclusive to Pokemon Blue.