An episode guide where you can find snatches, or even whole scenes with Shigeru in them.
 

Episode 01: I Choose You, Pikachu!
Episode 12: Here comes the Squirtle Squad!
Episode 30: Dig those Diglett!
Episode 43: Attack of the Prehistoric Pokemon!
Episode 53: The ultimate test!
Episode 55: Riddle me this!
Episode 60: Battle for the badge!
Episode 62: Showdown at the pokemon corral
Episode 72: Round one - begin!
Episode 73: Fire and ice!
Episode 74: Fourth round rumble!
Episode 112: Return to Pallet town!
Episode 113: Rival confrontation: Satoshi VS Shigeru!