Bulbasaur, Chikorita, Treecko, and Turtwig all contain the letter R; Snivy and Chespin do not. Charmander, Cyndaquil, Torchic, and Chimchar all contain the letter C; Tepig and Fennekin do not. Squirtle, Totodile, Mudkip, and Piplup all contain the letter I; Oshawott does not, but Froakie does.
What does this mean?
What this means is that Mustardπ314 reads far too much into odd coincidences that... aren't actually even patterns. --- For those of you starting topics about the PS4, there's a PS4 board: http://www.gamefaqs.com/boards/691087-playstation-4