First, you shouldn't really have the same move type in a Pokemon set, but I guess since it's Yellow, it'll slide. These are my suggestions for Pre E4
Blastoise- Ice Beam, Surf, Hydro Pump, Withdraw
Pikachu- Thunderbolt, Dig, Mega Kick, (filler)
Charizard- Fissure, Flamethrower, Mega Punch, Slash
Gengar- Shadow Ball (is this in this gen?)/Psychic, Hypnosis, Confuse Ray, Night Shade
Pidgeot- Fly, Wing Attack, Silver Wind, Steel Wing (is it in this gen?)/Sand Attack
Venasaur- Razor Leaf, Leech Seed, Poison Powder, Vine Whip
Sorry if it's not the best; I'm rusty on this first gen.