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Pokémon fans, listen up, Professor Oak's had a makeover.

The new prof looks totally different to the Samuel Oak we know and love.

He's swapped his white laboratory coat and short hair for sunglasses and long hair and a beard.

And Oak's not just got a laid-back look, he's got a new name too - Grand Oak.

It's part of a new app, Pokémon ³ÉÈË¿ìÊÖ, being launched by Nintendo.

It's a cloud service that lets users move Pokémon they've caught and trade them on the go, launched on several platforms including Nintendo Switch and Android and iOS devices.

The new-look character Grand Oak will take users through the process of joining up.

What do you think? And which Professor do you prefer?

If you cannot see the quiz, click here.