>>55356028Pidgeot > Fearow - pretty obvious
Alakazam > Machamp - trade evos, next to each other on the dex, brain vs brawn motif
Rhydon > Venomoth - Safari Zone Pokemon, Red and Blue already have a poison vs ground version exclusive so it makes sense to work it in here
Exeggutor > Parasect - it's the only other non-version exclusive grass type
Gyarados > Staryu - Blue gets the two-stage evolutionary stone Grass/Psychic, you get the two-stage evolutionary stone Water/Psychic
Arcanine > Ninetales - again, obvious
