Professor Oak holding a book

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Man in Lab Coat — White, Friendly

805 × 1504

Cartoon Scientist Holding Cookie — Black, Humorous

1680 × 1050

Cartoon Scientist Holding Cookie — Black

1600 × 1200

Cartoon Scientist Holding Cookie — Blue, Humorous

1440 × 900

Cartoon Scientist — Blue, Playful, Comic

1600 × 1200

Scientist with Lab Equipment

1920 × 1200

Scientist with Grill — Gray, Humorous

1024 × 768

Scientist with Grill — Gray

1024 × 768

Pokémon in Poké Balls — Yellow

1920 × 1080

Five Poké Balls — Black

1440 × 900

Professor Oak frustrated

1600 × 900