Lapras+Feraligatr+Blastoise is redundant. Choose 1.
Arcanine-What purpose is Iron Head serving? He cannot dream of OHKOing Rock pokemon with it. Magnet is inferior to Expert Belt, and Life Orb/Leftovers is preferable. Decide what role Arcanine is filling on your team, he can run a variety of builds.
Pikachu-He needs support to switch in safely. Sleep, Encore, etc. can help gain free switches.
Shiftry-Extrasensory and Faint Attack are not viable moves. You'll probably want to build a new Shiftry from scatch if you're determined to use him.