Well...I beat Yellow at last. Silver is up next...sadly.
Team Blissy (Final)

Silver X (Butterfree) Lv. 48
Final Stats: 144/64/77/92/105
Moves: Mega Drain, Toxic, Supersonic, Psybeam

Night Wing (Pidgeot) Lv. 48
Final Stats: 165/103/99/109/97
Moves:
Fly, Rest, Quick Attack, Take Down

Spooky (Haunter) Lv. 51
Final Stats: 122/72/69/128/135
Moves: Hypnosis, Dream Eater, Thunderbolt, Psychic
Weird...but all it's remaining PP for every move is 8.